Which historical event best fits the theme of "the defense of individual liberty"? a. in 1863, the u. s. government started a program to rebuild the south after the civil war. b. in 1975, the last american troops withdrew from vietnam; the country soon fell to communism. c. in 1920, the women's suffrage movement achieved its goal of securing women's right to vote. d. in 1848, the united states won texas and other territories through its war with mexico.