Vietnam War

===ARVN taking the lead and U.S. ground-force withdrawal===
[[File:ARVN and US Special Forces.jpg|thumb|ARVN and US Special Forces, September 1968]]

Beginning in 1970, American troops were withdrawn from border areas where most of the fighting took place and instead redeployed along the coast and interior. US casualties in 1970 were less than half of 1969 casualties after being relegated to less active combat.<ref name="upi1970">{{Cite web |title=Vietnamization: 1970 Year in Review |url=http://www.upi.com/Audio/Year_in_Review/Events-of-1970/Apollo-13/12303235577467-2/#title |archive-url=https://web.archive.org/web/20110831125343/http://www.upi.com/Audio/Year_in_Review/Events-of-1970/Apollo-13/12303235577467-2 |archive-date=31 August 2011 |website=UPI.com}}</ref> While U.S. forces were redeployed, the ARVN took over combat operations throughout the country, with casualties double US casualties in 1969, and more than triple US ones in 1970.<ref name="Wiest">{{Cite book |last=Wiest |first=Andrew |title=Vietnam's Forgotten Army: Heroism and Betrayal in the ARVN |date=2007 |publisher=NYU Press |isbn=978-0-8147-9451-7 |pages=[{{GBurl|id=r3dez4JhXUQC|p=124}} 124]–140}}</ref> In the post-Tet environment, membership in the [[South Vietnamese Regional Force]] and [[South Vietnamese Popular Force|Popular Force]] militias grew, and they were now more capable of providing village security, which the Americans had not accomplished under Westmoreland.<ref name=Wiest/>

In 1970, Nixon announced the withdrawal of an additional 150,000 American troops, reducing the number of Americans to 265,500.<ref name=upi1970/> By 1970, Viet Cong forces were no longer southern-majority, as nearly 70% of units were northerners.<ref>{{Cite book |last=Porter |first=Gareth |title=Vietnam: The Politics of Bureaucratic Socialism |date=1993 |isbn=978-0-8014-2168-6 |page=26|publisher=Cornell University Press }}</ref> Between 1969 and 1971 the Viet Cong and some PAVN units had reverted to [[small unit tactics]] typical of 1967 and prior instead of nationwide grand offensives.<ref name=Nguyen/>{{Rp|}} In 1971, Australia and New Zealand withdrew their soldiers and U.S. troop count was further reduced to 196,700, with a deadline to remove another 45,000 troops by February 1972. The United States also reduced support troops, and in March 1971 the [[5th Special Forces Group (United States)|5th Special Forces Group]], the first American unit deployed to South Vietnam, withdrew to [[Fort Bragg]], [[North Carolina]].<ref name="StantonVOB">{{Cite book |last=Stanton |first=Shelby L. |title=Vietnam order of battle |date=2003 |publisher=Stackpole Books |isbn=978-0-8117-0071-9}}</ref>{{Rp|240}}{{Refn|On 8 March 1965 the first American combat troops, the [[3rd Marine Division (United States)#Vietnam War|Third Marine Regiment, Third Marine Division]], began landing in Vietnam to protect the [[Da Nang Air Base]].{{Sfn|Willbanks|2009|p=110}}<ref>{{Cite web |date=2010 |title=Facts about the Vietnam Veterans memorial collection |url=http://www.nps.gov/mrc/reader/vvmcr.htm |url-status=dead |archive-url=https://web.archive.org/web/20100528032742/http://www.nps.gov/mrc/reader/vvmcr.htm |archive-date=28 May 2010 |access-date=26 April 2010 |publisher=[[National Park Service]]}}</ref>|group="A"}}