I lived on Okinawa for 2.5 years as the Viet Nam war wound down. The fighting troops, Marines and Army processed out of Viet Nam through Okinawa after the US left Viet Nam.
Those of us who were technicians and support staff lived in a semi normal relationships with the Island Locals. While i was on island, the US allowed the Okinawans to vote on their choice of remaining a US protectorate, and becoming the newest Prefecture of Japan.
The Okinawans chose Japan.
The 2.5 years went fast, but when the war wound down, the Troops who were coming home from Viet Nam turned the island on it's head with nearly nightly murders of bar girls, prostitutes, and house boys perpatrated by the returning soldiers and marines.
I was discussing the subject with an Army pal (I was USAF) who said basically, that the shocking murderous behavior we were seeing on Okinawa for the first time, was just SNAFU everyday wartime behavior in combat zones.
Yes, the Marines on Okinawa were barred from the NCO clubs for Army, Navy, and USAF personnel. We got a new Island Commander during my years on island, and he was opposed to keeping the Marines out of the other Service clubs. He referred to it as discriminatory agaainst the poor, victimized Marines. He rescinded the standing policy, and permitted The Jar Heads to enter NCO Clubs of all the Services on his first day as Island Commander.
The Marines brawled and busted up every USAF, Navy, and Army NCO club on the Island that night.
On the 2nd day of the New Commander's duty, he reinstated the Ban.
I have never trusted drunk Marines since that time.