The US military is one of the largest employers in the country and is a relative microcosm of American society, bringing in people from diverse backgrounds and history to defend the nation from all enemies. Military and civilian leaders address the same challenges as those found in the civilian world, including diversity, inclusion, equity, and belonging. The US military has both led and followed the nation in establishing policies of diversity and inclusion. In this second edition, the editors and contributors provide a revised, updated, and expanded overview of the ways in which diversity and inclusion are dispatched in the US military by providing information and knowledge about celebrated and contested social characteristics including race, ethnicity, religion, gender, and sexuality and three new groups comprising the military: the (dis)abled, civilians, and immigrants. Astute subject matter experts contribute contemporary, must have, go to chapters into a fresh, compelling, and insightful volume on the roles that each of these groups occupy in the US armed services as well as the laws, rules, and regulations regarding their participation. This new edition also provides eleven Lived Experiences that enliven and humanize each chapter and will assuredly inspire readers.