Claim: Ranger School is open to all Military Occupational Specialties (MOSs) in the U.S. Army, however, the two largest groups of attendees for Ranger School are from the U.S. Army's Infantry Basic Officer Leadership Course (IBOLC), and the 75th Ranger Regiment.
Evidence: Ranger School is open to all Military Occupational Specialties (MOSs) in the U.S. Army, although—as of April 2011—an Army combat exclusion zone still limits some from attending, but this does not include women as women are now allowed to attend the school. However, the two largest groups of attendees for Ranger School are from the U.S. Army's Infantry Basic Officer Leadership Course (IBOLC), and the 75th Ranger Regiment.