You probably got Peter III as Elizaveta's second promptly changing sides as soon as Elizaveta was out of the picture, but the final opponent's second is Joseph, MT's second. After the war is over, he goes to meet his hero at Neisse at that famous meeting (as depicted in "Five Things"!). But later in life, he decides to start the War of the Bavarian Succession, knowing full well that Prussia's not going to stand for it. Middle-aged Heinrich and old man Fritz get on their horses and head south with their army.
It ends up being informally called the Potato War, because Joseph takes up an impregnable position and neither Heinrich nor Fritz can do anything about it. So both armies spend most of their time foraging for food during the stand-off.
Eventually MT goes behind his back and gets Catherine to force Joseph to make peace, by threatening to get Russia involved on Fritz's side if he doesn't.
Re: Dueling
You probably got Peter III as Elizaveta's second promptly changing sides as soon as Elizaveta was out of the picture, but the final opponent's second is Joseph, MT's second. After the war is over, he goes to meet his hero at Neisse at that famous meeting (as depicted in "Five Things"!). But later in life, he decides to start the War of the Bavarian Succession, knowing full well that Prussia's not going to stand for it. Middle-aged Heinrich and old man Fritz get on their horses and head south with their army.
It ends up being informally called the Potato War, because Joseph takes up an impregnable position and neither Heinrich nor Fritz can do anything about it. So both armies spend most of their time foraging for food during the stand-off.
Eventually MT goes behind his back and gets Catherine to force Joseph to make peace, by threatening to get Russia involved on Fritz's side if he doesn't.