The first one is an American Volunteers Cross, awarded to American volunteers who fought with Poland in WWI.

The second is a Haller's Swords for Americans, for Polish-Americans who fought under General Jozef Haller. More info here.

The third one seems to commemorate the 50th anniversary of the Polish Army Veterans in America.

The fourth is a Cross of Polish Soldiers from America, of the type issued between 1920 and 1930.

The fifth seems to be a Military Action Cross USA/Canada, but I'm not sure that's its exact name.

The sixth one says something like Proof of Merit.