What are the conditions and steps to be a ranger in America?

First, you must have at least a green card, that is, the right of abode in the United States, and then

May not be female; Secondly, it must be a soldier (the vast majority are the US Army, and a few are other US services or American allied soldiers); Third, you must register as a volunteer, and you must be physically and mentally healthy and have no bad records; Fourth, you must pass the airborne assessment before you can participate in the selection of rangers;