Complex sentence: This "chivalric code", while perhaps rather anachronistic, required that men always wore their German uniform beneath the enemy's, and before combat, the men would hold fire until they made their own uniforms visible.
Split into simpler sentences: This "chivalric code", while perhaps rather anachronistic, required that men always wore their German uniform beneath the enemy's, and before combat. The men would hold fire until they made their own uniforms visible.