The M24 Chaffee light tank was first fielded in the last months of WW2 to replace the M3 Stuart in the US and allied armies. Although it saw some combat during WW2, it was really tested in Korea against North-Korean T-34/85.
The M24’s 75mm gun proved hardly able to penetrate the communist tank’s armor, and itself was severely under-armored to withstand the T-34’s 85mm volleys. It was therefore only used as fire support for the infantry (as was the case for the French M24 squadron at Dien Bien Phu) or as a recon tank.
It is in this later role that it survived up to the 70’s in the Norwegian Army, before being modernized from 1972. The upgraded variant, renamed NM116, had better motorization and fire-control, and its outdated 75mm gun replaced with a French 90mm quite similar to that of the AML 90 Lynx.
Norway retired the NM116 from service in 1993 and the M24 also saw service with Pakistan, Japan, Taiwan, South Korea, and many more.