Refugees, green card holders, and even undocumented immigrants are also required to register.
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Refugees, green card holders, and even undocumented immigrants are also required to register.
Who Could Be Drafted if the US Goes to War?

The US Selective Service System has existed since 1917 and requires all men aged 18–25 to register.
In a wartime scenario such as World War III, eligible men could be called to serve through a lottery system.
Refugees, green card holders, and even undocumented immigrants are also required to register, meaning they too could be drafted if needed.
Women and People with Severe Disabilities Are Currently Exempt

At present, women are not required to register for the draft, though there have been discussions about changing the law.
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People with severe disabilities may also be exempt from service but must still complete registration.
This ensures the government knows exactly who is eligible if a draft is activated.
Conscientious Objectors Can Apply for Deferment

Individuals who refuse to fight due to moral or religious beliefs can apply for conscientious objector status.
A famous example is World War II medic Desmond Doss, portrayed in the film Hacksaw Ridge.
These individuals may still serve in non-combat roles such as medics or support staff, depending on national needs.
Other Exemptions Include Students and Essential Workers

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Full-time students, key technology workers, and those in essential industries may qualify for deferments.
Parents or caregivers of young children can also apply for hardship deferments.
The aim is to ensure critical roles at home are maintained even during large-scale military mobilization.
How the Draft Lottery Works

If a draft is activated, the process starts with men turning 20 in the year of the draft.
They are followed by 21-year-olds, then 22-year-olds, and so on until age 25.
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Men aged 18 and 19 are only called once the older age groups have been exhausted.
Two Lottery Machines Decide Who Is Called First

The draft lottery uses two machines, one with 365 (or 366) balls labeled with dates, and one with the same number of balls labeled with sequence numbers.
A date and a number are drawn together to determine the order of induction.
Those with the lowest sequence numbers are called up first.
Draft Results Are Announced and Sent Out Quickly

After the lottery is completed, results are certified and the sequence list is sent to the Selective Service System.
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Men whose birthdays have the lowest numbers are contacted first, often within days.
In modern times, results would likely be broadcast live on TV and streamed online.