Collocations for commander - noun

senior, supreme, top
deputy, subordinate (AmE)
joint
air-force, army, military, naval, navy, police
battalion (BrE), brigade, company, corps, division (esp. AmE), group, platoon, unit
fleet, flight, squadron
Allied
General Eisenhower was Supreme Allied Commander in Western Europe.

commander of
the commander of US forces in Iraq

Commander-in-Chief