The years are all wrong on those, unless you mean the post invasion Polish forces. The western Allies had Polish units. And Russians put togtehr Polish units from the captured territirie to fight the Germans too.
If you are doing Invasion of Poland-era, then stick to 1939.
For the Luksusowa scenario, I did research to see what units the Poles actually fielded. These are limited to 1939:
Bofors You can even find pictures of Polish-manned Bofor guns on the web
Renault R-35 The Polish government tried to purchase Somoa’s (considered to be the best tank of the era) from the French, but ended up purchasing Renaults.
Bren Machine Gunner Polish light armour, what they had, were often equipped with BRENs.
I heard that as well. It seemed that at tourney’s people were stacking their armies with all hero’s so a general house rule of one hero. I do not think it’s mentioned in the rules at all. Some tactics can be employed as far as 4/4’s go. I too have no problem mixing units.
example: 4/4 Bar gunners support 5/5 Ranger’s I sure people can come up with more but that just springs to mind.
You have to be carefule I was used like a tool when I sent KAR 98’s against Screaming Eagle’s (First game) It was a blood bath. The trick is to play to the utits strengths and use supporting units. I’m a big fan of snipers and MG42’s