In the words of a contemporary historian, "They ate at the same table and slept in the same bed;" and, most extraordinary of all, when Louis was subsequently called to a distant part of his dominions to quell an insurrection, he intrusted the government of Bavaria, during his absence, to Frederic.
Frederic's impetuous and ungovernable brother Leopold, was unwearied in his endeavors to combine armies against the emperor, and war raged without cessation.

At length Louis, harassed by these endless insurrections and coalitions against him, and admiring the magnanimity of Frederic, entered into a new alliance, offering terms exceedingly honorable on his part.

He agreed that he and Frederic should rule conjointly as emperors of Germany, in perfect equality of power and dignity, alternately taking the precedence.
With this arrangement Leopold was satisfied, but unfortunately, just at that time, his impetuous spirit, exhausted by disappointment and chagrin, yielded to death.

He died at Strasbourg on the 28th of February, 1326.

The pope and several of the electors refused to accede to this arrangement, and thus the hopes of the unhappy Frederic were again blighted, for Louis, who had consented to this accommodation for the sake of peace, was not willing to enforce it through the tumult of war.