its an M44 APC , can carry 25 troops and 2 crew and was based on the M24 chafee tank
The advent of aluminum alloy armor in the 1950s for the first time made it possible for a fully-enclosed 9-man infantry squad carrier under 10 tons--compared to the 20+ ton steel monstrosities like the M44 and M59 neither of which could even fit into a C-130--much less be taken into the air.