The Grand Duchy was the largest state in Europe. It stretched from the Baltic to the Black Sea. It was also the last pagan stronghold in Europe. The Teutonic Knights were created to combat them. These are called the Northern Crusades.

This ties in to u/Maui_Boy post about John III Sobieski. He briefly reformed the Grand Duchy.

This also ties into what is happening in Ukraine. Or will when Ukraine is ultimately dismantled. I have mentioned before here I think Poland and Lithuania have designs on a new Grand Duchy.

The Grand Duchy was the largest state in Europe. It stretched from the Baltic to the Black Sea. It was also the last pagan stronghold in Europe. The Teutonic Knights were created to combat them. These are called the Northern Crusades.