Beadu-mægen

According to the Old English Dictionary:

beadu-mægen

gen. -mægnes; n. Battle-strength, military power; militaris vis, exercitus stragem faciens :-- Beadumægnes rǽs, grím-helma gegrind the rush of battle-strength, the crash of grim helmets, Cd. 160; Th. 198, 28; Exod. 329. beadu-mægen