Original caption: "The Heavy Tank M6 was an American heavy tank designed during World War II. The tank was produced in small numbers and never saw combat. 
M6 Heavy Tank trials, December 8, 1941."

Heavy tank

M3 Half-Track with a limited traverse 105mm M2A1 Howitzer. The location of the gun mount forced the relocation of the vehicles gas tanks to the rear of the vehicle. (scanned by HOS Bandit)

M3 Half-Track 105mm Howitzer

Fitted with the turret of the M8 self-propelled gun, with it's 75mm short-barrel howitzer, and carrying sandbags for additional protection along the tops of their hulls, these LVT(A)4 Amtracs are heading for the assault beaches on Okinawa. (scanned by HOS Bandit)