Book excerpt: "Mexican Protestantism was born in the encounter between Mexican Catholics and Anglo American Protestants, after the United States ventured into the Southwest and wrested territory from Mexico in the early nineteenth century. In Sea la Luz, Juan Francisco Martinez traces the birth and initial development of this ethno-religious community brought through the westward expansion of the United States. Using the records of Protestant missionaries, he uncovers the story of Mexican converts and the churches they developed. Those same records reveal Protestant attitudes toward the war with Mexico, the conquest of the Southwest, and the Mexican population that became U.S. citizens with the signing of the Treaty of Guadalupe-Hidalgo (1848)."--BOOK JACKET.