arming, armament, equipping -- (the act of equiping with weapons in preparation for war)
Overview of verb arm
The verb arm has 2 senses
arm, build up, fortify, gird -- (prepare oneself for a military confrontation; "The U.S. is girding for a conflict in the Middle East"; "troops are building up on the Iraqi border")
arm -- (supply with arms; "The U.S. armed the freedom fighters in Afghanistan")