Although Cambodia had achieved independence by late 1953, its military situation remained unsettled. Non-communist factions of the Khmer Issarak had joined the government, but communist Viet Minh activities increased at the very time French Union force were stretched thin elsewhere. In April 1954, several Viet Minh battalions crossed the border into Cambodia. Royalist forces engaged them but could not force their complete withdrawal. In part, the communists were attempting to strengthen their bargaining position at the Geneva Conference that had been scheduled to begin in late April.