The 1973 prize went to North Vietnamese leader Le Duc Tho and United States Secretary of State Henry A. Kissinger “for the 1973 Paris Peace Accords intended to bring about a cease-fire in the Vietnam War and a withdrawal of the American forces”. Tho later declined the prize. However, North Vietnam invaded South Vietnam in April 1975 and reunified (This is not sufficiently euphemistic. I suggest replacing “reunified” with “happy-fuzzified-togethernessed” -Ed.) the country. Kissinger’s history included the secret 1969–1975 campaign of bombing against infiltrating North Vietnamese Army troops in Cambodia, the alleged U.S. involvement in Operation Condor—a mid-1970s campaign of kidnapping and murder coordinated among the intelligence and security services of Argentina, Bolivia, Brazil, Chile (see details), Paraguay, and Uruguay—as well as the death of French nationals under the Chilean junta. He also supported the Turkish Intervention in Cyprus resulting in the de facto partition of the island.[citation needed] According to Irwin Abrams, this prize was the most controversial to date. Two Norwegian Nobel Committee members resigned in protest.[97][98] When the award was announced, hostilities were continuing. (Emphasis added)
You forgot my favorite case!