Here's what you need to know about the military draft, and why the US' conflict with Iran...

After the Pentagon confirmed it had launched an airstrike that killed top Iranian general Qassem Soleimani, young Americans began worrying about the possibility of being drafted in a potential war stemming from the strike.

Almost immediately, searches for "World War 3" and "World War 3 draft" spiked on Google Search and became trending topics on Twitter, sparking copious memes of people imagining how they avoid being drafted into the military. It even sparked a parody account, @urfaveisdrafted, which has rapidly gained thousands of followers.

While the US military relies entirely on a volunteer corps, all American men aged 18-25 are mandated to be registered with the Selective Service Administration, which maintains the list of Americans who would be called upon to serve if Congress instituted a draft.

Registering for the Selective Service is a requirement to receive federal student loans and access to other federal programs, qualify for federal employment, and in many states, obtain a driver's license.