All,
A humble proposal; expand the Vietnam map just a little to go from Taiwan to Singapore, then east to the Philippines. Then on that map, you could place:
Early World War II campaign as (or against) the American Volunteer Group, also know as the Flying Tigers.
A French air campaign against the Viet Minh.
The Vietnam War
And a modern, hypothetical conflict showing the Chinese infrastructure built on the reefs in the South China Sea.