Military technology, range of weapons, equipment, structures, and vehicles used specifically for the purpose of warfare. It includes the knowledge required to construct such technology, to employ it in combat, and to repair and replenish it.

Red ArmyCold War-era poster of Soviet army equipment.

The technology of war may be divided into five categories. Offensive arms harm the enemy, while defensive weapons ward off offensive blows. Transportation technology moves soldiers and weaponry; communications coordinate the movements of armed forces; and sensors detect forces and guide weaponry.

From the earliest times, a critical relationship has existed between military technology, the tactics of its employment, and the psychological factors that bind its users into units. Success in combat, the sine qua non of military organizations and the ultimate purpose of military technology, depends on the ability of the combatant group to coordinate the actions of its members in a tactically effective manner. This coordination is a function of the strength of the forces that bind the unit together, inducing its members to set aside their individual interests—even life itself—for the welfare of the group. These forces, in turn, are directly affected both by tactics and by technology.

The influence of technology can be either positive or negative. The experience of the ancient Greek hoplite infantrymen is one example of positive influence. Their arms and armour were most effective for fighting in close formation, which led in turn to marching in step, which further augmented cohesion and made the phalanx a tactically formidable formation. The late medieval knight offers an example of the negative influence of technology. To wield his sword and lance effectively, he and his charger needed considerable space, yet his closed helmet made communication with his fellows extremely difficult. It is not surprising, then, that knights of the late Middle Ages tended to fight as individuals and were often defeated by cohesive units of less well-equipped opponents.

hoplite