The Infantry or Rifle Battalion, which, with its attached troops, comprises a unit of between 1,000 and 1,500 men. The Battalion consists of three line companies and a headquarters company. These companies have alphabetical names: A, B, and C for a first Battalion; D, E, and F for a second Battalion; G, H, and I for a third Battalion. To avoid confusion of letters sameness these alphabetical designations have been given names: Able for A, Baker for B, Charlie for C, Dog for D, Easy for E, Fox for F, George for G, How for H and Item for I. A Company has four Platoons composed of four squads of about 10 men each. With its own special troops, a Company has a strength of between 200 and 250 men. Three Battalions compose a Regiment, and a Regiment can reach a strength of between 3,000 to 4,500 men. A Division consists of three line Regiments and an artillery Regiment. The line Regiments of the First Marine Division are the First, Fifth, and Seventh. At full strength a Marine division can carry 25,000 men on its roster, because being a self-sufficient amphibious force, it requires an enormous number of supporting troops. In effect, a Marine Division amounts to a small army. The Marine Corps manpower had dropped from a postwar level of 155,592 in 1946 to a low of 74,270 in 1950. And only 40,364 were in fighting trim.