Thanks Wyatt, a real gentleman in defeat.
The key to succes is not to waste time... push push push, like the Wehrmacht in Barbarossa... smash the Commonwealth troops in the south and race north before they get reinforcements and air superiority -which they got when I marched on Dimapur.
I took some risks, not bothering too much about bridges blown behind me and -very risky indeed- leaving only a small screening border defense in the east... During the last turns I spotted Chinese units popping up there... I had to win the battle for Dimapur ...
It's essential to use your shock TO's carefully.. glad I had some left for the final assault.