Is it a type error?

[v0031]

The Germans
There were 93 different types of German fighter aircraft. The Germans were known for Blitzkrieg attack. These lightning fast attacks would serve to make breaks in enemy lines from the air. It is hard in battle to hold your line and to stay safe from air attacks. As breaks were made in the line, the Germans on the ground would move into the enemy hold. The planes would fly in to the zones in groups, hit quickly, and then move our quickly. This method was how Germany was able to successfully invade Poland.

I think it shoule be out.

[The Houstonian]

Yes, it is supposed to be out, not our.