Not all the generals were on board with the new political arrangement. General José Gonzalo Escobar led a rebellion in March 1929 against the interim Portes Gil government. The U.S. backed the interim government and Escobar was unable to obtain arms, so the revolt failed. Although short-lived, it highlighted the necessity of finding a better mechanism for the transfer of the presidency as well as to bring to an end the Cristero War. Calles himself took command of government troops to suppress the months' long Escobar Rebellion.