"The Bavarians have experienced to their cost that you are a valiant prince; but Providence has decided the battle.

Though I am happy to see you as my guest, I sympathize with you in your sorrow, and will do what I can to alleviate it." For three years the unhappy Frederic remained a prisoner of Louis of Bavaria, held in close confinement in the castle at Trausnitz.

At the end of that time the emperor, alarmed at the efforts which the friends of Frederic were making to combine several Powers to take up arms for his relief, visited his prisoner, and in a personal interview proposed terms of reconciliation.

The terms, under the circumstances, were considered generous, but a proud spirit needed the discipline of three years' imprisonment before it could yield to such demands.
It was the 13th of March, 1325, when this singular interview between Louis the emperor, and Frederic his captive, took place at Trausnitz.
Frederic promised upon oath that in exchange for his freedom he would renounce all claim to the imperial throne; restore all the districts and castles he had wrested from the empire; give up all the documents relative to his election as emperor; join with all his family influence to support Louis against any and every adversary, and give his daughter in marriage to Stephen the son of Louis.

He also promised that in case he should fail in the fulfillment of any one of these stipulations, he would return to his captivity.
Frederic fully intended a faithful compliance with these requisitions.
But no sooner was he liberated than his fiery brother Leopold, who presided over the Swiss estates, and who was a man of great capacity and military energy, refused peremptorily to fulfill the articles which related to him, and made vigorous preparations to urge the war which he had already, with many allies, commenced against the Emperor Louis.