From what I have found out in the last few weeks from ship passenger record Peter came to the US twice; once when he was about 4, when most of his family came over, and then again when he was about 9 when his mother made a second trip with older brother's (Henry JR.) wife. What I don’t know is when they went back to Austria (not Germany).
I have found the census records for the family for 1900, 1910, 1920 and 1925 in Minot. I have found Peter’s, Karl’s, and Henry’s WWI draft cards.
They immigrated through Ontario, Ontario. They departed from Liverpool, so it must have been a long disjointed trip from Austria. On the draft card Peter gives his home town, but I have not been able to come up with a map reference for how I interpret his hand writing.
I have started a family tree for Russell William Kanz (me) that has most of the documents attached to the people. You may find it interesting. You can reach me at bill dot kanz at Comcast dot net.
Sorry it has taken so long to reply.