Meanings

swift attack

method of attack

to march on the capital

siege

offensive strength

attack preparedness

offense

to be at a loss how to continue an offensive

offensive camp

drum used in ancient warfare to signal an attack

dedication to study or research

attacking force

aggressiveness

offensive and defensive alliance

to take by storm (e.g. a castle)

attack forces

to attack persistently

offensive weapons

attacking formation

specialization (in a field of study)