When and where people move has large implications for economic and political outcomes. Do interactions with other people influence these mobility decisions? What are the mechanisms through which peer interactions affect mobility? To answer these questions, I am constructing a new dataset of Naval service records in World War II. By matching with the 1940 and 1950 Full Count Censuses, I will be able to track men who served in the Navy before and after the war, and look at a rich set of characteristics of their peer network during the war.