Abstract:This dissertation critically analyzes the literature on the transition of U.S. military veterans from military to civilian life. With a particular focus on the psychology and social challenges of loneliness and social isolation, these factors have emerged as significant yet often overlooked risks that complicate veterans’ reintegration and sense of identity. Through a systematic review of theoretical and empirical literature, this study examines the impact of identity disruption, loneliness, and social isolation on veterans after service. Drawing from both qualitative and quantitative sources, the research integrates diverse data to provide a comprehensive and insightful understanding of these experiences. The findings aim to identify the theoretical frameworks that best explain the experience of loneliness and isolation among veterans after military transition and propose strategies for improving the veteran post-military process.