Hi Wiz,
I'm with Danny on this - it sounds exactly like a call to arms.
The man was on a boat - a yacht from memory - when the group of aliens approached him, and his initial reaction was too run. The aliens were amazed by his speed and strength, but then they thought he'd killed himself in his panic by jumping overboard. They didn't realise humans could swim. The man himself when they caught him was told about being recruited to become a soldier in their never ending war and didn't want a bar of it. He wanted to be a writer or an artist of some sort. But the aliens were convinced humans could be the shock troops they needed and they went ahead with their recruitment of humanity - and eventually the man enlisted and was happy as a soldier.
Does none of this sound right? If not can you give us some more please.
Cheers, Greg.