Armed Forces Little Tablet Imprintable Coloring Book. The United States Armed Forces make up six service branches: Air Force, Army, Coast Guard, Marine Corps, Navy, and Space Force. There are three common categories of military people: active duty (full-time soldiers and sailors), reserve & guard forces (usually work a civilian job, but can be called to full-time military duty), and veterans and retirees (past members of the military). We cannot forget the millions of family members and friends of military members, past and present. Through illustrations and activities, the U.S. Armed Forces Coloring & Activity Book aims to inform its readers about the United States’ military and its ideals and values.