In mobilizing against the war in Vietnam, American activists did not operate in isolation. Indeed, the antiwar movement had important connections with other domestic social struggles, and opposition to the war in Vietnam was a global phenomenon. This chapter focuses first on the antiwar movement’s relationship with a number of social movements that encapsulate the broader, activist spirit of the 1960s-the civil rights movement, the New Left, the women’s rights movement, and the gay liberation struggle. Finally, the international nature of opposition to the war in Vietnam is examined.