Or Japan can just wait another turn en put pressure on India with its transports. That way the British can either retreat or lose India… The Japanese army could split in two: one army could take the rest of China and perhaps a few Russian territories, the other army can hold FIC with fighter support against the Brits and eventually beat the combined allied army in Yunnan…
I don’t think attacking a well-defended Yunnan is a good idea in J3.
Not only the battle matters, but what takes place afterwards matters as well. Let’s assume that all Japanese land units in the battle are gone after the battle.
Will China be able to recapture territories other than Yunnan? Without attacking Yunnan, it’s a lot easier to keep the North under control.
Are there Russian mechanized units that can push further?
If the front breaks due to having no land units / reinforcements, can the British retake Hong-Kong?
Is the loss of Japanese air critically allowing the US fleet to put more pressure on Japan?
Were the land units participating in Yunnan needed to retake the DEI?
I’m happy to give my opponents a slight positive TUV battle for as long as my position is improved afterwards. As important as Yunnan might be, it might be better to wait and build up rather than trading units and territories.