I have some new images! Correct me if I am wrong.

Polish Medals and Badges
So I think this is a Armoured Divison Badge.

Polish Medals and Badges
I believe this is the same? Collar badge.

Polish Medals and Badges
2nd Corps Mermaid of Warsaw?

If anyone knows the history of these items (what they mean/ duties in war..etc) I would love to hear them.

Also if anyone knows any history on 156 Pułk Piechoty (II RP) (better information than Wikipedia/ google search) I would be really interested in that.