Rajapura or Rajapuram was the capital of the ancient Kamboja Kingdom mentioned in the Mahabharata. Karna led a war expedition against the Kamboja and some other tribes of the Uttarapatha a little time before the Kurukshetra war i.e.
Rajapura or Rajapuram was the center of the ancient Kambojan state that appeared in the Mahabharata. Karna initiated a conflict with the Kamboja and neighboring tribes of Uttarapatha, preceding the Kurukshetra battle.