This paper characterizes the behavioral and policy implications of the decline in the number of military veterans in the U.S. Congress, from more than 70% of legislators in the early 1970s to less than 30% in the contemporary House and Senate. Many scholars argue that military service shapes information and beliefs, and that this decline has had negative effects on defense policy. The analysis tests these arguments using voting data from the House and Senate in the 1990s and the House in the 1970s, showing that the impact of veteran status on votes is generally small and has a relatively minor effect on legislative outcomes.