On 19 May, Nixon approved a list of equipment to be provided to South Vietnam by 1 August and Project Enhance began.
[2]: 213–5 Operation Enhance provided South Vietnamese armed forces with artillery and anti-tank weapons, 69 helicopters, 55 jet fighters, 100 other aircraft, and 7 patrol boats.
He wanted the South Vietnamese to have a maximum of equipment on hand before the restrictions in the peace agreement took place.
An adviser to President Nguyen Van Thieu said that the operations had political value as a sign that the U.S. would not abandon South Vietnam"[6][3]: 48–9 The Paris Peace Accords, signed by all parties to the war on 27 January 1973 prohibited replacement of military equipment in South Vietnam except on a one-for-one basis and ended large transfers of military equipment from the United States.
The agreement also required the withdrawal of nearly all U.S. military personnel although the US would retain several thousand civilian advisers in South Vietnam.