Evacuations Without War: Is the War Powers Resolution Enough?

By Ben Barnes '27

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In recent years, the United States has repeatedly used military assets to pull citizens out of sudden crises abroad. (1) These noncombatant evacuation operations, or NEOs, look and feel like military missions. Troops fly into unstable regions, secure airfields or ports, and escort civilians out. Yet they are usually described as emergency efforts to protect nationals rather than as the United States entering a new armed conflict. That raises a basic question about authority: Is the War Powers Resolution, together with existing statutes, enough to govern these evacuation decisions, or should Congress have to pass new authorization each time American civilians need to be rescued?

The War Powers Resolution of 1973 was written after the Vietnam War to pull Congress back into decisions about using force. It tells the President to consult Congress “in every possible instance” before introducing troops into hostilities and to report within forty-eight hours when forces are sent into combat or into situations where hostilities are clearly imminent. It also creates a sixty-day clock for withdrawal, with a short extension for safe disengagement if Congress has not declared war or passed specific authorization. (2) What the statute does not do is define “hostilities.” That silence matters when an operation is meant to be a short, protective evacuation rather than an open-ended campaign. Presidents still have to decide whether a given NEO crosses the line into “hostilities,” and those calls are usually made inside the executive branch. The Resolution was meant to slow unilateral moves toward war by forcing presidents to consult and report to Congress. The basic goal was to check unilateral presidential uses of force by slowing them down and forcing Congress to weigh in.

At the same time, Congress has built a separate evacuation framework that assumes presidents will act fast when Americans are in danger. Under Section 4 of the State Department Basic Authorities Act, the Secretary of State can spend emergency funds to evacuate United States government employees and private citizens from areas of danger. (3) The State Department’s Foreign Affairs Manual (FAM), including crisis and evacuation chapters in 7 FAM 1900, turns that authority into practical guidance for embassies and consulates and treats evacuation planning as a normal part of consular work. (4) On the military side, Joint Publication 3-68 defines NEOs as missions to remove designated civilians from threatened areas, often in potential or actual combat zones, with force used mainly for protection and deterrence rather than offensive operations. (5) To staff these missions on short notice, 10 U.S.C. § 12304 lets the President activate certain reserve forces for limited contingency operations that fall short of a declared war or national emergency. (6) Together, these provisions show that Congress expects the executive branch to act quickly and decisively when Americans abroad face danger.

These statutes not only outline logistics but also shape how courts view executive authority during evacuations. Courts often think about presidential power using the framework from Youngstown Sheet & Tube Co. v. Sawyer. In that case, the Court explained that the President’s authority is strongest when acting with support from Congress, weakest when acting against Congress’s will, and in a middle ground when Congress has not spoken. (7) In the evacuation context, Congress has clearly spoken. It has funded evacuation programs, told the State Department to plan for them, and given the President a reserve call-up tool for short-term crises. That record looks similar to what the Court approved in Dames & Moore v. Regan, where a history of congressional acceptance helped uphold presidential action in a crisis involving Iran. (8) Taken together, this pattern of legislation and judicial approval shows that most evacuations fall in the strongest category, where current law already supports fast executive action without a new Authorization for Use of Military Force.

The most difficult situations arise when an evacuation takes place inside an active war zone or drags on longer than expected. Marines guarding an airfield can come under fire from local militias. Naval vessels standing off the coast may face missile or drone threats. Once troops start returning fire, it becomes harder to say that forces have not been introduced into hostilities. The executive branch has sometimes read “hostilities” narrowly, focusing on the scale, duration, and risk of a mission. The Office of Legal Counsel’s 2011 opinion on Libya, for example, concluded that the President could join a limited air campaign without prior authorization because the United States' exposure and the expected duration were tightly constrained. (9) That opinion dealt with airstrikes rather than evacuations, but it shows a broader instinct to distinguish between “war” and limited uses of force. In a world of fast-moving regional conflicts and threats to close partners, a system that slows down lawful rescue cannot be relied on. The challenge is to preserve speed while still giving Congress a meaningful role.

Because of this structure, a new evacuation-specific authorization is probably not the right fix. Congress has already recognized a duty to protect United States nationals abroad in the Basic Authorities Act, evacuation funding, and reserve activation provisions. (10) Requiring a fresh authorization every time a crisis erupts would slow response and risk lives in moments when delay is most costly. It would also be difficult to write an evacuation-focused authorization that does not either repeat existing law or accidentally open the door to much wider uses of force. A better approach is to refine the War Powers framework. Congress could clarify that any NEO in an area of active hostilities must be reported under the Resolution within forty-eight hours, regardless of how limited the mission appears. It could define “hostilities” to include evacuations where United States forces are reasonably expected to encounter armed groups, even when the primary goal is to avoid fighting, and require unclassified summaries of such reports so the public has basic information about the scope of these operations.

Noncombatant evacuations live in an uneasy space between war and consular work. They are not routine administrative tasks, and they are not always the first move in a long campaign. For most evacuations, the combination of the War Powers Resolution and existing statutory authority is sufficient, and no new authorization is needed. The real problem lies in the gray zone where rescue missions start to look and feel like war. Addressing that gray zone through clearer triggers and reporting rules would do more to align law with modern practice than another broad grant of power, and it would better reflect the shared role of Congress and the President when American lives and key alliances are at stake overseas.

Endnotes

1. U.S. Congress, Congressional Research Service, Instances of Use of United States Armed Forces Abroad, 1798–2023.

2. War Powers Resolution of 1973, 50 U.S.C. §§ 1541–1548.

3. State Department Basic Authorities Act, 22 U.S.C. § 2671.

4. U.S. Dep’t of State, 7 Foreign Affairs Manual (FAM) 1900, Crisis and Evacuation.

5. Joint Chiefs of Staff, Joint Publication 3-68, Noncombatant Evacuation Operations (Nov. 2015).

6. 10 U.S.C. § 12304.

7. Youngstown Sheet & Tube Co. v. Sawyer, 343 U.S. 579 (1952).

8. Dames & Moore v. Regan, 453 U.S. 654 (1981).

9. Office of Legal Counsel, U.S. Dep’t of Justice, Authority to Use Military Force in Libya (Apr. 1, 2011).

10. State Department Basic Authorities Act, 22 U.S.C. § 2671; 10 U.S.C. § 12304.