Societal Influence and Patterns of Change in Warfare

Warfare and society shaped one another

The history of warfare is more than a sequence of new weapons. The organisation of society affected who fought, who commanded and how armies were supported. Changes in warfare could then alter the power of different social groups. These connections help explain why military developments mattered beyond the battlefield.

In medieval England, c1250–c1500, warfare included civil conflicts and wars against France, Scotland and Wales. Armies were therefore an important part of society. The relationship between social rank and military power provides a clear example of how warfare and society were connected.

Social rank shaped medieval armies

Under the feudal system, land was granted in return for service to a lord. Military service was one such obligation, and those serving were expected to provide their own equipment and provisions. This connected the organisation of an army to the organisation of landholding.

The hierarchy extended from the king through lords, noblemen and gentry to peasants. Lords commanded armies, while noblemen and gentry served as knights. Mounted knights fought on horseback with weapons such as swords and lances, protected by helmets and chainmail. Peasant infantry fought on foot and had lower status; their protection could include skull caps and leather jackets.

Command therefore reflected social position more than proven combat skill or experience. A high-ranking commander was not necessarily an able commander, so leadership quality varied. Warfare also served the interests of kings and lords seeking to defend or extend their power. Castles were important centres of that power and frequent military targets.

Battlefield roles could reinforce—or challenge—social rank

Mounted knights were initially a powerful battlefield force. A mounted charge could break into enemy lines, while pursuing scattered troops could turn a retreat into a rout. Infantry held off attacks and fought enemy foot soldiers, including in close hand-to-hand combat.

This military prominence reinforced the knights' superior social standing. However, high status did not make them immune to changes in weapons and formations.

Longbows entered English armies in the 1290s and became an important weapon for roughly the next 150 years. Their rapid shooting, range and power made archers more effective against knights, horses and infantry. Longbow arrows could penetrate chainmail, challenging an important form of knightly protection.

Scottish infantry also used schiltrons: tightly packed circles or squares of soldiers with pikes pointing outwards. These formations could resist cavalry attacks, increasing the importance of well-organised foot soldiers. William Wallace used schiltrons, and the formation also remained important after his time.

The result was a decline in the numbers and dominance of mounted knights, not the disappearance of cavalry. Mounted troops increasingly performed tasks such as scouting and patrolling, and could dismount to fight defensively. A change in battlefield roles was therefore more complex than simply replacing horses with foot soldiers.

Military change could alter social relationships

As feudal obligations weakened and securing military service became more difficult, kings increasingly paid soldiers to fight, including hired mercenaries.

The declining dominance of noble knights and greater use of paid troops reduced kings' reliance on the nobility for military power. This weakened the connection between social class and military command. Society had helped shape the earlier army, but developments in warfare were now helping to reshape relationships within society.

Change could be gradual and uneven

A trend is a direction of development over time. The declining dominance of mounted knights across c1250–c1500 was a trend produced by several developments, rather than an immediate change on one date.

Gunpowder weapons demonstrate why invention and widespread use must be distinguished. Knowledge of gunpowder reached Europe from China in the thirteenth century, but cannon were becoming a standard siege weapon by about 1450. Their ability to damage city and castle walls could shorten sieges and made older castle designs increasingly vulnerable.

Yet early cannon were heavy, expensive, inaccurate and slow to reload. They needed trained personnel and complicated transport arrangements, and could fail to fire or explode. These limitations restricted their usefulness even as improvements increased their effectiveness. Change was therefore uneven: a weapon could become important in sieges without being equally useful for every battlefield task.

Local loyalties slowed changes in recruitment

In the early modern period, c1500–c1700, recruitment did not immediately become national or professional. Royal officials called Commissioners of Array helped muster local civilian men, whose equipment and pay came from local taxes. Local militias, also called Trained Bands, provided defence: their members bought weapons and trained together, but frequently resisted service outside their own areas.

This shows how social organisation could limit military organisation. Men who understood their duty as defending their locality were not necessarily willing to campaign elsewhere. Continuity in local recruitment persisted even while weapons and battlefield formations changed.

The English Civil Wars, fought between Charles I's Royalists and Parliament in 1642–49, put this system under pressure. Both sides needed more soldiers than traditional methods supplied. Parliament introduced conscription—compulsory military recruitment—in 1643, and the Royalists followed in 1644. Numbers increased, but poor training and desertion remained problems. Recruiting more men was not the same as creating an effective army.

The New Model Army marked a change in organisation

In 1645 Parliament combined separate local forces into the New Model Army, a national force of about 22,000 men under Thomas Fairfax. National taxation supported it, rather than each locality maintaining its own separate army. This linked a more unified military organisation to the government's ability to raise money.

Greater emphasis on drill training and strict discipline made it more professional. Drill meant repeatedly practising movements and procedures until troops could perform them together. Infantry received a standard russet, or orangey-red, coat and were promised pay of eight pence a day. However, wages could be paid late, and at least half the infantry were conscripts. Professionalisation was a direction of change, not an instantly completed transformation.

Military experience and ability received greater emphasis in leadership. Oliver Cromwell, who commanded the army's cavalry, argued that commitment and skill should matter more than social rank. The reorganisation therefore challenged the older close connection between elite status and command without making social differences disappear.

New tactics helped explain the value of sustained training. Musketeers fired together to compensate for poor individual accuracy, while different rows took turns firing and reloading. Pikemen protected them against charges. Keeping these formations intact required coordinated movement and discipline, which were easier to develop through regular practice than by assembling civilian soldiers only when war began.

A turning point could outlast the institution that began it

The New Model Army continued after the Civil Wars, representing a shift towards a standing army: a permanent force maintained even in peacetime. When the monarchy was restored in 1660, Charles II disbanded it but established a new, small standing army. The particular army changed, yet the principle of maintaining permanent troops continued.

Public attitudes constrained this development. People feared that a peacetime army might be used against them and objected to the taxes needed to support it. Charles II's force therefore began with only a few thousand troops. The growth of permanent forces was neither unlimited nor universally welcomed.

The year 1645 is a useful turning point in army organisation because it brought local forces together and strengthened national funding, training and discipline. Its significance becomes clearer when looking beyond that date: the standing-army principle survived the political change of 1660.

Industrial society changed military possibilities

During c1700–c1900, industrialisation connected warfare to factories and new transport networks. Machine production allowed weapons to be manufactured on a larger scale; the Enfield factory was producing rifles by machine from 1857. Railways and steamships changed how troops and supplies could be moved. An army's effectiveness increasingly depended on society's manufacturing and transport capacity, not just the soldiers present on a battlefield.

Improved weapons changed the balance between military roles. The Enfield rifle-musket adopted in 1853 offered much greater effective range than earlier smoothbore muskets. Later breech-loading weapons could be reloaded more quickly, while the Maxim machine gun greatly increased the volume of fire. Infantry could expose charging cavalry to fire from farther away and for longer.

Again, decline did not mean disappearance. By 1900, British cavalry in South Africa often fought on foot with rifles, while horses remained useful for movement and scouting. The continuing use of horses alongside newer weapons shows why historical change is rarely a complete replacement of everything old.

Reform altered the connection between wealth and command

Military organisation also changed during the nineteenth century. Edward Cardwell's reforms as Secretary for War, 1868–74, included abolishing the purchase of officers' commissions in 1871. A commission is an officer's appointment; purchasing one had allowed wealth to help determine access to command. Ending purchase reduced that direct connection and placed greater emphasis on merit and seniority.

The Army Enlistment Act of 1870 replaced the usual twenty-one-year enlistment with twelve years, normally six in full-time service and six in the reserve. Reservists were trained soldiers who could return to service when needed. From 1872, paired infantry battalions linked overseas service with recruiting and training at home through county regiments.

These changes show that military development included careers, training and organisation as well as weapons. The abolition of purchase was a turning point in how officers obtained rank; the broader growth of a more professional army was a longer trend.

Modern war widened the obligation to serve

During c1900–present, the relationship between military service and civilian life changed repeatedly. Britain entered the First World War in 1914 without conscription: additional recruits enlisted voluntarily. In January 1916, Parliament passed the Military Service Act, introducing compulsory recruitment in Great Britain. This was a turning point because serving was now a legal obligation for men covered by the Act, rather than a voluntary decision.

The first Act applied principally to single men aged 18–40; married men were brought within its scope in May 1916. Conscription was not applied in Ireland. Tribunals considered claims for exemption, including essential civilian work, ill health, domestic hardship and conscientious objection—refusal to fight on grounds of conscience. Military demands therefore reached into families and workplaces, but did not override every civilian need or belief.

This was not a steady, uninterrupted expansion of compulsory service. First World War conscription ended in 1920. Limited conscription returned in 1939 before the Second World War, and the National Service (Armed Forces) Act widened liability when war began that September. Recruitment changed with Britain's circumstances rather than following a single direction throughout the century.

Total war depended on civilians as well as soldiers

Total war involves mobilising a country's civilian labour and economic resources as well as its armed forces. The Second World War illustrates why putting everyone into uniform would not necessarily strengthen an army: troops also depended on essential work being done at home.

People in vital occupations could be reserved from military call-up. From 1943, some conscripts were directed into coal mining as the Bevin Boys rather than into the armed forces. Their work supplied an essential industry, showing how the government organised civilian labour as part of the war effort. By 1942, liability to call-up also extended to women aged 20–30, with exemptions; mobilisation was no longer confined to recruiting male soldiers.

These arrangements strengthened the connection between warfare and everyday society. The government had to balance military manpower against the workers needed to sustain the country. The trend towards wider mobilisation concerned the whole war effort, not simply the size of the army.

National Service continued into peacetime, then ended

Unlike after the First World War, compulsory service did not end soon after fighting stopped in 1945. The National Service Act 1948 established the post-war peacetime system. From January 1949, eligible healthy men aged 18–30 were required to serve for eighteen months, followed by a period in the reserve. In 1950, during Britain's involvement in the Korean War, full-time service increased to two years.

National Service connected the armed forces to civilian society by requiring young men to interrupt civilian lives for military service even in peacetime. Yet essential employment still mattered: exemptions included qualifying work in coal mining, farming and the merchant navy. Compulsory recruitment and protection of necessary civilian labour continued together.

National Service was phased out from 1957. Call-ups ended in December 1960, and the last conscripted servicemen left in May 1963. Ending call-ups was another turning point in the relationship between citizens and the armed forces: Britain moved away from routine compulsory service towards voluntary professional service. It did not mean the end of the standing army.

The distinction continues to matter. In 2024, amid public debate about military recruitment, the Ministry of Defence reaffirmed that Britain's military was a voluntary force and denied that there was a plan to return to conscription. Across the modern period, the enduring institution was a permanent military force; the changing feature was how widely civilians were obliged to join it.

Recognising continuity and turning points

Continuity means that a feature persists. Castles remained military targets even as cannon changed how they could be attacked. Cavalry continued to serve even as mounted knights lost their earlier dominance. Local recruitment remained important before the New Model Army, despite changes in weapons. Change and continuity can therefore occur together.

A turning point is a development that significantly changes the direction or pace of events. Compare conditions before and after it: did it alter battlefield roles, the effectiveness of defences or the organisation of armies? The growing effectiveness of cannon against fortifications is a stronger argument for significant change than the mere fact that gunpowder had arrived.

The examples also reveal different speeds of change. Mounted knights declined over a long period; Parliament reorganised its army in a particular year; industrial production and successive weapon improvements transformed military possibilities over decades. A single date can mark an important decision without completing the whole process.

Modern recruitment shows that change could also reverse direction. Conscription began in 1916, ended in 1920, returned in 1939 and continued into post-war National Service before call-ups ended in 1960. These changes widened and then reduced compulsory participation, while the standing army persisted.

Across the warfare theme, ask what changed, what remained, how quickly developments spread and which parts of warfare they affected. Dates establish the sequence; explaining the connections reveals the process of change.

Society ↔ warfare

• Medieval landholding and hierarchy: service accompanied landholding; social rank shaped command. Paid troops and effective infantry weakened reliance on noble knights.
• Early modern local loyalties: militias often resisted campaigning outside their areas. National funding helped support a national army.
• Industrial society: factories supplied weapons; railways and steamships moved troops and supplies. Reform reduced the direct role of wealth in obtaining officer rank.
• Modern mobilisation: compulsory service reached into civilian lives. Total war also required essential civilian workers: reserved occupations and the Bevin Boys demonstrate this balance.

Changes and continuities

• 1290s: longbows entered English armies; schiltrons also challenged cavalry.
• By c1450: cannon were becoming standard siege weapons. Castles remained targets, but methods of attack changed.
• 1645: New Model Army—national organisation, stronger drill and discipline. Many infantrymen were still conscripts; pay could be late.
• 1660: Charles II replaced the New Model Army with a small standing army. Permanent military service continued.
• 1853: Enfield rifle-musket adopted; later breech-loaders and machine guns increased firepower. Cavalry continued in altered roles.
• 1870–72: shorter service and a reserve; purchase of commissions abolished in 1871; paired county battalions from 1872.
• 1914 → 1916: voluntary recruitment followed by conscription in Great Britain. Conscription ended in 1920.
• 1939: conscription returned; wartime mobilisation drew on civilian labour as well as armed service.
• 1949: post-war peacetime National Service began under the 1948 Act.
• 1960 / 1963: call-ups ended / last conscripted servicemen left. Voluntary professional service continued; the standing army remained.

Patterns to distinguish

• Trend: long-term direction, such as increasing professionalisation.
• Turning point: significant change in direction or pace, such as the army reorganisation of 1645 or compulsory recruitment in 1916.
• Uneven change: weapons, recruitment and command need not change together.
• Reversal: modern conscription began, ended, returned and ended again—not uninterrupted growth.
• Invention ≠ widespread adoption: cost, reliability, transport and training could delay change.
• Change ≠ total replacement: older roles and institutions could persist in modified forms.