军事战术（希腊语：Taktikē，管理军队的艺术）是使用武器或军事单位，进行攻击或防御敌人的行动。随着时间的推移，军事战术亦随着哲学和科技的进步而进步。

以目前的军事思想，军事战术是最基础的规划；涉及小单位，从几十到几百人。最高级的军事计划是军事战略，它处理战争行动与国家目的之间的关系。它们中间的规划是军事行动，它把军事战略细化到军事战术的实施级别。

美国陆军战场手册3-0提供了以下的定义策略：“策略－（美国国防部）一．战斗单位的使用。二．有序的安排和演习，得使在面对盟军和/或我们的敌人时，能利用其充分的潜力。（陆军）战斗单位的雇用。它包括从多个角度（如地形），安排和处理的军事单位间的关系。”

Military tactics are the science and art of organizing a military force, and the techniques for combining and using weapons and military units to engage and defeat an enemy in battle. Changes in philosophy and technology have been reflected in changes to military tactics; in contemporary military science tactics are the lowest of three planning levels: (i) strategic, (ii) operational, and (iii) tactical. The highest level of planning is strategy, how force is translated into political objectives, by bridging the means and ends of war. The intermediate level, operational level, the conversion of strategy into tactics deals with formations of units. In the vernacular, tactical decisions are those made to achieve the greatest, immediate value, and strategic decisions are those made to achieve the greatest, overall value, irrespective of the immediate results of a tactical decision.