Predictable CTD on ToW3: Korea

[Sneaksie]

The game is not guaranteed to run on integrated graphics chipsets. I guess it runs out of video memory (because unlike after custom battle, in campaign the game must load the strategic map which needs a substantional amount of memory).
There is an option in game settings called something like 'keep strategy map in memory', try turning it on. You can also lower graphics settings that eat up video RAM (uncheck high sky detail and maybe high landscape detail).