 Carranza then formally rejected the offer, and the threat of war with the US eased.Carranza was assassinated in 1920 during an internal feud among his former supporters over who would replace him as president.Three Sonoran generals of the Constitutionalist Army, Álvaro Obregón, Plutarco Elías Calles, and Adolfo de la Huerta dominated Mexico in the 1920s.