This article reviews the academic literature on the U.S. Department of Defense (DoD) budget and provides implications for future research. From the viewpoint of political science, the previous studies can be
categorized into two broad types ((1) building models to explain the U.S. DoD budget, (2) evaluating the
U.S. security policy through defense budget). However, I found three problems in this research field. The first is few discussions between incrementalism and anti-incrementalism. The second is an overall scarcity of research from the viewpoint of budget allocation. The third is no common measure to evaluate the DoD budget for understanding the U.S. defense policy. Further research is required to bridge the gaps.
