Southwest of Saigon IV Corps , meanwhile , remained Presence relatively stable with its forces aggressively preventing Preventing_or_letting VC units from taking over Getting any provincial capitals .

Launched Using by Richard Nixon as a follow-up to the earlier ground invasion during the Cambodian Campaign , the initial targets of the operation were the base areas and border sanctuaries of the People 's Army of Vietnam ( PAVN ) and the Viet Cong ( VC ) .

Operation Sunrise was the first phase of a long range South Vietnamese counter-offensive against the Viet Cong ( VC ) during the Vietnam War .

However , over 50 of the hamlets were soon infiltrated Becoming_a_member and easily taken over Conquering by VC who killed Killing or intimidated village leaders .

The US-Australian objective was to drive Motion out Viet Cong ( VC ) fighters who had taken up Temporary_stay positions on several key hills .

In a part of the operation ( known later as the Battle of Gang Toi ) , 1RAR attacked Attack a VC bunker and trench system .