This thesis examines the U.S. Navy’s current strategy in the Persian Gulf and assesses which aspect of that strategy-deterrence or assurance-makes a more significant contribution to regional stability in the greater Middle East region. This research draws from two cases: the Navy’s deterrence-based strategy surrounding Iranian aggression toward the Strait of Hormuz and the Navy’s assurance-based strategy using Saudi Arabia as an example. The findings indicate that Iran poses little threat to the Strait of Hormuz for various economic and military reasons, suggesting that perhaps the Navy’s policy of deterring Iran through the presence of warships is misguided and unnecessary. Alternatively, providing assurance to Saudi Arabia seems to have a...