This bibliography differs from the previous publications in this series since it concerns a specific time in American history, the Mexican War period from 1835 to 1850. From a military standpoint, the victorious efforts of American military forces can be considered as the proving ground for the Army and the Navy that emerged during the Civil War. The annexation of Texas and the acquisition of lands from Mexico predestined both the expansion of the United States to the Pacific and the conflict which divided brother from brother. This bibliography lists pertinent materials to be found in the Military History Research Collection related to this part of American history and is not intended to be a definite listing of bibliographic references on the period.

Genealogists and other historical researchers have valued the first two editions of this work, often referred to as the genealogist's bible."" The new edition continues that tradition. Intended as a handbook and a guide to selecting, locating, and using appropriate primary and secondary resources, The Source also functions as an instructional tool for novice genealogists and a refresher course for experienced researchers. More than 30 experts in this field--genealogists, historians, librarians, and archivists--prepared the 20 signed chapters, which are well written, easy to read, and include many helpful hints for getting the most out of whatever information is acquired. Each chapter ends with an extensive bibliography and is further enriched by tables, black-and-white illustrations, and examples of documents. Eight appendixes include the expected contact information for groups and institutions that persons studying genealogy and history need to find. ""