Well, the 14th Army seems to be well-remembered on the Net: try "forgotten army" burma on Google for books, press articles and personal memoirs. As well as British troops, there were Indian and African soldiers too, who are probably even more forgotten.

I think "forgotten" comes from the time when Britain was celebrating Victory in Europe, and the only ones who weren't celebrating were those with men still fighting the Japanese. I think it's the fate of far-away wars to fade from the public consciousness back home; ther were no Japanese bombers to remind us in Coventry or Liverpool.

Steve