President Trump wants the US to have its own “Space Force” — which would be like the Army and the Navy, “but for space,” he says.

The idea was floated Tuesday during his visit to the Miramar military base in San Diego.

“Space is a war-fighting domain, just like the land, air and sea,” Trump explained while speaking to a crowd of Marines.

“We should have a new force called the Space Force,” he said, noting how the plan started as a joke before eventually becoming a very real possibility.

“I was saying it the other day, because we’re doing a tremendous amount of work in space, I said ‘Maybe we need a new force, we’ll call it the Space Force.’ And I was not really serious, and then I said, ‘What a great idea. Maybe we’ll have to do that.’”