If you think thats Confusing ask Americans about the M1.
Or about the M2 There is the M2 Bradley IFV The M2 half track the M2 light tank the M2 medium tank the M2 heavy machine gun the M2 carbine the M2 flamethrower the M2 mine the M2 mortar the M2 tripod the M2 compass andthe M2 target rocket