The number of attendees for the upcoming “Storm Area 51” event has reached 1.4 million, making it greater than the second largest army in the world. According to a UFO expert, the movement has become so big that it’s already starting to get out of hand.

The event, officially named “Storm Area 51: They Can’t Stop All Of Us,” was organized through Facebook by a gaming channel and a meme page. It is scheduled to take place on Sept. 20 with the goal of raiding the base to free the aliens allegedly being held captive there.

Although the organizers clearly indicated in the Facebook page that the event is just a joke and has no intention of carrying out a violent raid on the top-secret military base, it didn’t stop people from joining the movement.

As of this writing, over 1.4 million people have signed on to attend the event while another 1.1 million expressed interest in the movement. The number of attendees for the event is greater than India’s standing army, which is currently the second largest in the world with 1,395,100 troops. China is number one on that list with 2,183,000 soldiers and the U.S. filling in the third spot at 1,347,300.

The event has gotten so big that it has caught the attention of several government officials including Nick Pope, who used to investigate UFOs for Britain’s Ministry of Defense. Pope told Fox News that the event has gotten “somewhat out of hand” due to the number of people who will be going.

Despite this, Pope believes the people are only interested in the concept of the event and will not actually push through with the raid.

“They won’t go of course,” he said. “I think this just shows the huge level of interest in this subject.”

The event also caught the attention of the U.S. Air Force, which is the main operator of Area 51. Through an official warning, a spokesperson for the military branch reminded the event’s attendees that Area 51 is still part of the country’s armed forces and the U.S. Air Force is always ready when it comes to protecting its assets.

“[Area 51] is an open training range for the U.S. Air Force, and we would discourage anyone from trying to come into the area where we train American armed forces,” spokesperson Laura McAndrews told The Washington Post. “The U.S. Air Force always stands ready to protect America and its assets.”

Area 51 map
A map of Area 51, the secretive U.S. Air Force base that's the subject of countless conspiracy theories and a new ban on drones. Wikicommons