If the United States entered a third world war and Congress reinstated conscription, the people drafted first would be men ages 18 through 25 who are registered with the Selective Service System, with 20-year-olds called ahead of everyone else. That pool covers roughly the same group that has been required to register since the 1980s: male U.S. citizens and most male immigrants living in the country, whether documented or not. Women are not in it under current law. Nobody has been drafted in the United States since 1973, and reactivating the system would take an act of Congress and the President’s authorization.1Selective Service System. Return to the Draft
Who Is in the Draft Pool Today
Federal law requires almost every man living in the United States to register with the Selective Service within 30 days of turning 18, and the obligation runs until age 26. The Military Selective Service Act defines the covered group as every male citizen and every other male person residing in the United States between those ages.2Selective Service System. Military Selective Service Act
That definition sweeps in more people than many assume. U.S.-born citizens, naturalized citizens, legal permanent residents, refugees, asylum seekers, undocumented immigrants, and anyone whose visa expired more than 30 days ago are all required to register. Dual nationals must register even if they live abroad.3Selective Service System. Who Needs to Register
Registering does not put you in uniform. It puts your name in a database that would only be used if Congress and the President authorized inductions.
Who Is Not in the Pool
A few groups sit outside the registration requirement, and therefore outside a general draft:
- Men on valid non-immigrant visas, as long as that status is maintained through age 26.
- Men on continuous full-time active duty from age 18 through 26, including service academy students. Reserve and National Guard members not on full-time active duty still have to register.
- Men who were hospitalized, incarcerated, or confined to a long-term care facility continuously from before their 18th birthday through age 26, with no break of 30 days or longer.3Selective Service System. Who Needs to Register
Someone who leaves active duty before turning 26, or who joins the military only after 18, still has to register.
Women
Women are not required to register and would not be part of a general draft under current law. Congress has considered changing that. The Senate Armed Services Committee’s version of the FY2025 National Defense Authorization Act would have required automatic registration for “every citizen,” which would have brought women into the system, but that provision was removed before the bill was signed.4Congressional Research Service. FY2025 NDAA: Selective Service Registration Proposals A 2020 national commission had recommended the expansion.5Congressional Research Service. The Selective Service System and Draft Registration Unless Congress acts, a wartime draft would call men only, with one narrow exception for medical personnel discussed below.
Who Gets Called First
If a draft were activated, the Selective Service would not call everyone at once. A lottery randomly assigns numbers to birthdays, and those numbers set the induction order. The first group called is men whose 20th birthday falls that calendar year. If more troops are needed, additional lotteries follow this sequence: 21, then 22, 23, 24, 25, 19, and finally men who are at least 18 and a half.1Selective Service System. Return to the Draft
Two things about that order surprise people. Eighteen-year-olds are last, not first. And a man who turns 26 before his number is reached ages out of the pool entirely.
Anyone whose number comes up receives an induction order and reports to a Military Entrance Processing Station for physical, mental, and moral evaluations. Only those who pass are inducted.
Getting Out or Getting Delayed
Being called does not mean being sent. The Selective Service classification system recognizes several reasons a registrant can be deferred, exempted, or postponed.
- Medical disqualification. The Department of Defense maintains a list of disqualifying conditions. Some can be waived by the Secretary of a Military Department; others cannot.6Department of Defense. Medical Conditions Disqualifying for Accession Into the Military
- Dependency hardship, if service would create extreme hardship for a spouse, child, or parent.
- Ministerial deferment for ordained ministers and students preparing for the ministry.
- Sole surviving son, if a parent or sibling died in U.S. military service or is captured or missing in action. This is a full exemption in peacetime and reduces to preferential consideration in wartime.
- Prior service. Anyone who has already served is placed in a class that exempts them from induction.
- Critical civilian occupations, in rare cases, tied to the particular emergency Congress is responding to.1Selective Service System. Return to the Draft
Full-time college enrollment does not automatically protect anyone. Student deferments existed during Vietnam but are not guaranteed in any future draft; whether Congress reinstates them would depend on the legislation authorizing conscription.
Refusing on Conscience
A registrant who opposes war based on deeply held moral, ethical, or religious beliefs can file a conscientious objector claim. There are two classes. A 1-A-O opposes combat but will serve in a non-combatant military role. A 1-O opposes all military service and is assigned to alternative civilian service instead.7eCFR. 32 CFR Part 1636 – Classification of Conscientious Objectors
The standard is strict. The objection has to be to all war, not one specific conflict. Beliefs can be religious or purely ethical, but they must occupy a place in your life comparable to traditional religious conviction, and you have to show they developed through genuine study or contemplation and have meaningfully directed your life over time.7eCFR. 32 CFR Part 1636 – Classification of Conscientious Objectors
Alternative civilian service for 1-O objectors is performed at government agencies or nonprofits doing charitable work, public health, education, environmental conservation, social services, or community programs. The regulations name hospitals, nursing homes, conservation and firefighting programs, sheltered workshops, juvenile rehabilitation programs, and public works projects as examples.8eCFR. 32 CFR Part 1656 – Alternative Service
Timing matters. A conscientious objector claim can only be submitted after an induction order arrives. You cannot pre-file one from the registration database.9Selective Service System. 32 CFR Chapter XVI – Selective Service System Regulations
A Separate Pool for Medical Professionals
Alongside the general draft, the Selective Service maintains a standby plan called the Health Care Personnel Delivery System. If Congress and the President activate it, this plan would draft doctors, nurses, medical technicians, and specialists across more than 60 fields of medicine. The eligible pool is roughly 3.4 million health care professionals ages 20 through 45, and unlike the general draft, it includes women unless Congress specifically excludes them.1Selective Service System. Return to the Draft
Health care workers whose absence would seriously harm their communities could receive deferments under this plan based on community need.
After an Induction Notice
An induction order gives at least 10 days’ notice from the date it is issued, and any claim for a deferment, exemption, or CO status has to be filed before the scheduled reporting date.9Selective Service System. 32 CFR Chapter XVI – Selective Service System Regulations
Claims go first to a local Selective Service board. If the local board denies the claim, the registrant has 15 days from the mailing of the classification decision to appeal to a district appeal board. The appeal doesn’t need a specific form. A written notice with the registrant’s name and request is enough, and you can attach a statement explaining why the classification is wrong. If you want to appear in person before the appeal board, ask for that when you file.9Selective Service System. 32 CFR Chapter XVI – Selective Service System Regulations
How Likely Is Any of This
Turning the registration system into an actual draft takes new legislation amending the Military Selective Service Act and a presidential authorization. The United States has run an all-volunteer force for more than 50 years, including through two decades of combat in Iraq and Afghanistan without ever activating the Selective Service.10Council on Foreign Relations. The Uncertain Future of the U.S. Military’s All-Volunteer Force
The infrastructure is still there because no one can guarantee it will never be needed. A 2020 national commission recommended keeping the Selective Service and running regular mobilization exercises. For now, the registration requirement operates as a contingency, and any move to fill the ranks by conscription in a future war would face a hard congressional fight before anyone’s number came up.