When I was stationed at CCKAB , Taichung Taiwan in 1969 &70 we were using their base for our C-130's to support the Vietnam war. We were always reminded that we were using their base and they were always at war with mainland China. Quite a few days while I was on station there I observed the Taiwanese fighters returning from some kind of action regarding their ongoing war. Sometimes they returned victoriously and sometimes in a "missing man" formation. Of course my sources of info could have been normal
GI bullshit, but the Taiwanese military guys we would talk to would usually confirm the stories.