Hurricane - Singapore: Not enough fuel!

[JtD]

These are automated missions and it can happen quite often. The campaign generator was originally designed for eastern front scenarios, where flying distances hardly mattered.
I once flew a Pacific campaign and had at least five successive missions where I was the only plane to make it back to base, all other planes, both enemy and friendly, ran out of fuel before they got back. I quit playing that campaign.
As a worst case option, you can also open the mission editor and change the mission so that it works. Which brings me to the next point - try finding user made manual campaigns. These are often more atmospheric and you won't run into that sort of trouble. I'm pretty sure IceFire could recommend a few.