1930 4 June 16/2 Riot tank shoots water... Berlin police have equipped themselves with a motorized and armored water tank car.
1969 C. Himes (1973) 286 The riot tank didn't know where to look for him.
2003 M. Stanton ii. 171 Jackson's mayor..had ordered a thirteen-thousand-pound armor-plated riot tank with a submachine gun mounted on it.