The Evolution of Armor

Renault FT, introduced in 1917.  Some served all the way to 1949 even though they were really obsolete by 1930.

Soviet T33, served in the 1930s in Spain (photo courtesy of Daniel, in the photograph) and into World War Two, during which it quickly became obsolete.

M3 Stuart, produced from 1941 to 1944.  One of a series of light tanks that served in the U.S. Army during World War Two, all of which rapidly became obsolete.

M4 Sherman, it entered service in 1942 and was arguably approaching obsolescence by 1945.  Used by every Allied army during World War Two.

 

M18 Gun Motor Carriage, a "tank destroyer" which was really a sort of tank. Note the chassis evolution from the Sherman.

M48 "Patton" tank of the South Korean Army in 1987, this tank went into service in 1953 but was being replaced in U.S. service by the mid 1960 by what was essentially an upgraded model, the M60.

M60s.