As global tensions rise, many people have begun asking what would happen if the United States needed to reinstate a military draft. Although the U.S. armed forces currently rely on volunteers, the government still maintains a system designed to activate conscription if necessary.
Understanding how the draft works—and who could potentially be called—requires looking at the rules behind the Selective Service System, the federal program responsible for organizing a draft if Congress and the president approve it.
The Draft Is Not Currently Active
The United States has not used a military draft since 1973, when the country transitioned to an all-volunteer military. However, the Selective Service System remains in place as a contingency plan in case of a national emergency requiring more troops.
Reinstating the draft would require both Congress and the president to authorize it, meaning it cannot happen automatically.
Who Must Register for the Draft
Even though there is no active draft today, federal law requires nearly all male U.S. citizens and male immigrants between the ages of 18 and 25 to register with the Selective Service System.
This requirement includes:
- U.S.-born citizens
- Naturalized citizens
- Legal permanent residents
- Undocumented immigrants
- Refugees and asylum seekers living in the U.S.
Registration ensures the government has a database of people who could potentially be called to serve if conscription were reinstated.
How the Draft Would Likely Work
If the United States needed to activate a draft, the Selective Service System would use a lottery system based on birth dates to determine the order in which people are called.
Generally, the first group selected would be:
- Men turning 20 during the year of the draft
After that, the order would move through other age groups:
- Age 21
- Age 22
- Age 23
- Age 24
- Age 25
Once someone reaches age 26, they are typically no longer eligible for draft liability under current rules.
Possible Exemptions or Deferments
Even during a draft, not everyone selected would necessarily serve in combat roles. Certain individuals may qualify for exemptions or deferments, depending on their situation.
Examples can include:
- Certain government officials
- Ministers or religious leaders
- Individuals with serious medical conditions
- People working in critical industries or national-security roles
- Some veterans who previously served
In addition, people with moral or religious objections to war may apply for conscientious objector status, which could result in alternative service instead of combat duty.
Upcoming Changes to Registration
A significant change is scheduled to take effect in December 2026. Under the National Defense Authorization Act, eligible men ages 18–25 will be automatically registered using existing federal databases rather than registering themselves.
The goal is to ensure the Selective Service system has a more complete and accurate list of potential registrants.
How Quickly a Draft Could Begin
If the U.S. government authorized a draft during a national crisis, the Selective Service System is designed to deliver the first group of draftees within about 193 days after activation.
During that time, the system would process registrations, handle exemptions and appeals, and begin sending official induction notices.
The Bottom Line
While speculation about a global war often leads to discussions about the draft, the United States currently relies entirely on volunteer military service. The Selective Service System remains in place mainly as a backup plan.
If a draft were ever reinstated, the first people affected would likely be registered men between the ages of 18 and 25, selected through a lottery system and evaluated for eligibility, exemptions, or alternative service.
For now, however, officials emphasize that there are no active plans to reinstate the draft, and the Selective Service program remains a precaution rather than an immediate policy.
