The use of weapons has been a major driver of
cultural evolution and
human history up to today since weapons are a type of tool that is used to dominate and subdue autonomous agents such as animals and, by doing so, allow for an expansion of the cultural niche, while simultaneously other weapon users (i.e., agents such as humans, groups, and cultures) can adapt to the weapons of enemies by learning, triggering a continuous process of competitive technological, skill, and cognitive improvement (
arms race).
Prehistoric artifacts, including
bracelets,
axe heads,
chisels, and polishing tools. The use of objects as weapons has been observed among
chimpanzees, leading to speculation that early
hominids used weapons as early as five million years ago. However, this cannot be confirmed using physical evidence because wooden clubs, spears, and unshaped stones would have left an ambiguous record. The earliest unambiguous weapons to be found are the
Schöningen spears, eight wooden throwing spears dating back more than 300,000 years. At the site of Nataruk in Turkana, Kenya, numerous human skeletons dating to 10,000 years ago may present evidence of traumatic injuries to the head, neck, ribs, knees, and hands, including
obsidian projectiles embedded in the bones that might have been caused by arrows and clubs during conflict between two hunter-gatherer groups. But the interpretation of warfare at Nataruk has been challenged due to conflicting evidence.
Ancient history drawn by armored
cataphract horses, The earliest
ancient weapons were evolutionary improvements of late
Neolithic implements, but significant improvements in materials and crafting techniques led to a series of revolutions in
military technology. The development of metal tools began with
copper during the
Copper Age (about 3,300 BC) and was followed by the
Bronze Age, leading to the creation of the
Bronze Age sword and similar weapons. During the Bronze Age, the first defensive structures and
fortifications appeared as well, indicating an increased need for security. Weapons designed to breach fortifications followed soon after, such as the
battering ram, which was in use by 2500 BC. This led to the creation of the light, horse-drawn
chariot, whose improved mobility proved important during this era. Spoke-wheeled chariot usage peaked around 1300 BC and then declined, ceasing to be militarily relevant by the 4th century BC.
Cavalry developed once horses were bred to support the weight of a human. The horse extended the range and increased the speed of attacks. Alexander's conquest saw the increased use of spears and shields in the Middle East and Western Asia; as Greek culture spread, many Greek and other European weapons came to be used in these regions. Many of these weapons were then adapted to fit their new uses in war. In addition to land-based weaponry,
warships, such as the
trireme, were in use by the 7th century BC. During the first
First Punic War, the use of advanced warships contributed to a Roman victory over the Carthaginians.
Post-classical history European warfare during
post-classical history was dominated by elite groups of
knights supported by massed
infantry. They were involved in mobile combat and
sieges, which involved various
siege weapons and tactics. Knights on horseback developed tactics for charging with
lances, providing an impact on the enemy formations, and then drawing more practical weapons (such as
swords) once they entered melee. By contrast, infantry, in the age before structured formations, relied on cheap, sturdy weapons such as
spears and billhooks in close combat and
bows from a distance. As armies became more professional, their equipment was standardized, and infantry transitioned to
pikes. Pikes are normally seven to eight feet in length and used in conjunction with smaller sidearms (short swords). displayed in the
Tower of London In Eastern and
Middle Eastern warfare, similar tactics were developed independent of European influences. The introduction of
gunpowder from Asia at the end of this period revolutionized warfare. Formations of
musketeers, protected by
pikemen, came to dominate open battles, and the
cannon replaced the
trebuchet as the dominant
siege weapon. The Ottomans used the cannon to destroy much of the fortifications at Constantinople, which would change warfare as gunpowder became more available and technology improved.
Modern history Early modern The European
Renaissance marked the beginning of the implementation of firearms in western warfare.
Guns and
rockets were introduced to the battlefield.
Firearms are qualitatively different from earlier weapons because they release energy from combustible
propellants, such as
gunpowder, rather than from a counterweight or spring. This energy is released very rapidly and can be replicated without much effort by the user. Therefore, even early firearms such as the
arquebus were much more powerful than human-powered weapons. Firearms became increasingly important and effective during the 16th–19th centuries, with progressive improvements in
ignition mechanisms followed by revolutionary changes in
ammunition handling and propellant. During the
American Civil War, new applications of firearms, including the
machine gun and
ironclad warship, emerged that would still be recognizable and useful military weapons today, particularly in
limited conflicts. In the 19th century,
warship propulsion changed from
sail power to
fossil fuel-powered
steam engines. is used as both a
knife and, when attached to the front of a rifle, a
polearm. Since the mid-18th century North American French-Indian war through the beginning of the 20th century, human-powered weapons were reduced from the primary weaponry of the battlefield to yielding gunpowder-based weaponry. Sometimes referred to as the "Age of Rifles", this period was characterized by the development of firearms for infantry and cannons for support, as well as the beginnings of mechanized weapons such as the
machine gun. Artillery pieces such as
howitzers were able to destroy masonry fortresses and other fortifications, and this single invention caused a
revolution in military affairs, establishing tactics and doctrine that are still in use today.
World War I was the successor to the
Maxim gun and remained in British military service for 79 consecutive years. An important feature of
industrial age warfare was
technological escalation – innovations were rapidly matched through replication or countered by another innovation.
World War I marked the entry of fully industrialized warfare as well as
weapons of mass destruction (
e.g.,
chemical and
biological weapons), and new weapons were developed quickly to meet wartime needs. The
technological escalation during World War I was profound, including the wide introduction of
aircraft into
warfare and naval warfare with the introduction of
aircraft carriers. Above all, it promised the military commanders independence from horses and a resurgence in
maneuver warfare through the extensive use of motor vehicles. The changes that these military technologies underwent were evolutionary but defined their development for the rest of the century.
Interwar This period of innovation in weapon design continued in the interwar period (between WWI and WWII) with the continuous evolution of weapon systems by all major industrial powers. The major armament firms were
Schneider-Creusot (based in France),
Škoda Works (Czechoslovakia), and
Vickers (Great Britain). The 1920s were committed to
disarmament and the outlawing of war and poison gas, but rearmament picked up rapidly in the 1930s. The munitions makers responded nimbly to the rapidly shifting strategic and economic landscape. The main purchasers of munitions from the big three companies were Romania, Yugoslavia, Greece, and Turkeyand, to a lesser extent, Poland, Finland, the Baltic States, and the Soviet Union.
Criminalizing poison gas Realistic critics understood that war could not really be outlawed, but its worst excesses might be banned.
Poison gas became the focus of a worldwide crusade in the 1920s. Poison gas did not win battles, and the generals did not want it. The soldiers hated it far more intensely than bullets or explosive shells. By 1918, chemical shells made up 35 percent of French ammunition supplies, 25 percent of British, and 20 percent of American stock. The "Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous, or Other Gases and of Bacteriological Methods of Warfare", also known as the
Geneva Protocol, was issued in 1925 and was accepted as policy by all major countries. In 1937, poison gas was manufactured in large quantities but not used except against nations that lacked modern weapons or gas masks.
World War II and postwar Many modern military weapons, particularly ground-based ones, are relatively minor improvements to weapon systems developed during World War II. World War II marked perhaps the most frantic period of weapon development in the history of humanity. Massive numbers of new designs and concepts were fielded, and all existing technologies were improved between 1939 and 1945. The most powerful weapon invented during this period was the
nuclear bomb; however, many other weapons influenced the world, such as
jet aircraft and
radar, but were overshadowed by the visibility of nuclear weapons and long-range rockets.
Nuclear weapons Since the realization of
mutual assured destruction (MAD), the nuclear option of all-out war is no longer considered a survivable scenario. During the
Cold War in the years following World War II, both the United States and the Soviet Union engaged in a
nuclear arms race. Each country and their allies continually attempted to out-develop each other in the field of nuclear armaments. Once the joint technological capabilities reached the point of being able to ensure the destruction of the Earth by 100-fold, a new tactic had to be developed. With this realization, armaments development funding shifted back to primarily sponsoring the development of conventional arms technologies for support of
limited wars rather than
total war. == International arm cooperation ==