Hi guys I am German so I just wanted to give you some advice if you don't mind.
Your name is mostly right but if you want to write it the German way it be: "Erstes Österreichisches Feldartillerie-Regiment"
I know that you don't have the "Ö" on your keyboard, so you can just copy it.
First = "Erstes" but you could also write "1tes" thats often used as well.
I hope I could help you, have fun playing and greetings from Germany.