any specific behavior

an American operation in World War I (1918); American troops under Pershing drove back the German armies which were saved only by the armistice on November 11

the United States and its allies defeated Iraq in a ground war that lasted 100 hours (1991)

the military forces of a nation

a military operation carried out cooperatively by two or more allied nations or a military operation carried out by coordination of sea, land, and air forces

a military training exercise

several related operations aimed at achieving a particular goal (usually within geographical and temporal constraints)

an operation conducted primarily by naval forces in order to gain or extend or maintain control of the sea

an operation that is assigned by a higher headquarters

an American operation in World War I (1918); American troops under Pershing drove back the German armies which were saved only by the armistice on November 11

the United States and its allies defeated Iraq in a ground war that lasted 100 hours (1991)

the military forces of a nation