Complex sentence: In 1972, Fonda helped fund and organize the Indochina Peace Campaign, which continued to mobilize antiwar activists across the nation after the 1973 Paris Peace Agreement, through 1975, when the United States withdrew from Vietnam.
Split into simpler sentences: In 1972, Fonda helped fund and organize the Indochina Peace Campaign. It continued to mobilize antiwar activists across the nation after the 1973 Paris Peace Agreement, through 1975, when the United States withdrew from Vietnam.