Japanese translation correction, urinate on someone (not offensive...)?

Question:

I intend to speech about 小便小僧 (shoubenkozou) at my Japanese oral exams in 3 weeks. But I'm not sure how to construct a sentence that says 'he uriniated down on the enemy soldiers...'

This is what I have: ルーバンの部隊が負けそうのとき小便小僧が頭にきて敵部隊に小便した。

btw, ルーバン is the city where the forces fought...

Any help with a correction would be greatly appreciated.

Answer:

ルーバンで部隊が負けそうになったとき、小便小僧が頭に来て敵の部隊に小便をした。

your japanese is great!! (^-^)