CSAG INFORMATION PAPER
Designing USCENTCOM’s Post-U.S.-Iran War Environment: Partners, Posture, and Deterrence
By: (CSAG/CCJ5)

13 AUGUST 2026

Subject: “Designing USCENTCOM’s Post-U.S.-Iran War Environment: Partners, Posture, and Deterrence”

Purpose:
The 2026 U.S.-Iran war has severely degraded Iran’s conventional and strategic military capabilities, including its leadership, ballistic missile, drone, and proxy forces, but it has not resulted in regime change. Although negotiations continue following the signing of the U.S.-Iran memorandum of understanding (MOU), recent attacks have shown that the Islamic Republic of Iran retains enough residual capacity to threaten U.S. forces, regional partners, and commercial shipping.

For years, Gulf partners with significant support from the U.S. hardened their own defenses and relied on the U.S. “deterrence umbrella.” Although the “post-war” effects still need to be evaluated, the U.S. near-monopoly on security relationships can be questioned. Meanwhile, global demand for U.S. air, naval, and air and missile defense assets continues to grow, driven by the Pacific and European theaters, reinforcing longstanding pressures for U.S. retrenchment and burden-shifting in the Middle East.

This paper examines a post-deal environment in the USCENTCOM AOR, how relationships with regional partners are configured, and how USCENTCOM may adapt its posture and activities under constrained resources to secure U.S. interests.

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