Honouring the Marine Corps is a great reason to wear the Leatherneck Tartan.
I served in the U.S. Air Force. During the conflict in Southeast Asia, I served in a unit the provided direct support for a Marine unit. After returning to the States, I was sent on a six month tour of Camp LeJeune, to serve as a training instructor. The work is hard, and the days are long. During the training I was asked to be in a Marine uniform, as it was felt necessary by the command for delivering the proper message. I complied, with the request, but as soon as I was off duty, the EGA came off and the USAF went on. For both the war effort and the training effort, I have two plaques on display in my home with the EGA on top, but clearly written is my name followed by my branch of service - U.S.A.F.
I choose to not wear the Leatherneck Tartan, as I would not want anyone to think I was a Marine. I have fought beside and trained with the Marines, but I still am not a Marine. I have a very high level of respect for the Corps from being involved with a few of their operations. The Corps is simply amazing.