Me and my fiancé has been separated for three months
(since I left the army)she's german and she will be here in two days to get
Married that's great but where do I go concerning visas
For her to stay here with me what to do?

Regardless of the country in which your fiancée resides, the K1 Fiancée VISA is the only proper visa for her to use to enter the U.S. for the purpose of marriage. If she enters the US on another type of visa or visa waiver you can certainly legally marry her. However, she will then need to depart the U.S. obtain a K3 spousal visa at the U.S. Consulate in her country of residence and reenter the U.S. on the K3 visa in order to be able to remain in the U.S. permanently as your spouse. (excerpt from Fiancee Visa)

If you scroll down, the website also explains the requirements.

Good Luck.