 Complete the following phrase:  Juan Nepomuceno Álvarez Hurtado de Luna, generally known as Juan Álvarez, 27 January 1790  21 August 1867 was a general, long-time caudillo regional leader in southern Mexico, and interim president of Mexico for two months in 1855, following the liberals ouster of Antonio López de Santa Anna. Álvarez had risen to power in the Tierra Caliente, in southern Mexico with the support of indigenous peasants whose lands he protected. He fought along with heroes of the insurgency, José María Morelos and Vicente Guerrero in the 