The standard U.S. Army uniform at the outbreak of the war had acquired its definitive form in the 1858 regulations. It consisted of a Campaign Uniform, a Parade (Dress) Uniform, and a Fatigue Uniform. During the war, enforcement of uniform regulations was imperfect. Uniforms were adapted to local conditions, the commander's preference and what was available, for example, shoulder straps began replacing epaulettes in dress occasions. As a result almost any variation of the official uniform could be found as officers and men abandoned some items, adopted others and modified still others.