Germany
Sigismund and the Empire
France, at least, was no threat at this time, being preoccupied with in renewed English war effort under Henry V. In general, though, Sigismund found that he had more problems than he had resources. He did gain prestige for helping to end the Schism, but the same Council of Constance that settled the crisis in the papacy also executed Jan Hus, thereby precipitating a new crisis in Bohemia.
Although it did not matter much at the time, Sigismund took a momentous step when he married his daughter to Albert of Austria, thus uniting the Luxembourg territories (which included Hungary) with the House of Hapsburg. This laid the groundwork for the return of the Hapsburg family to Imperial power just a few years later.
Another momentous step was taken in 1415 when Sigismund raised Frederick of 
Hohenzollern,
burgrave of Nürnberg, to become the Elector of Brandenburg. The Hohenzollern family became famous in later centuries when another Frederick united several territories and created the modern German state of Prussia.
Finally, in 1423 Sigismund made Frederick of Meissen Duke of Saxony. Meissen was rich in minerals and was one of the richest principalities in Germany. Together, Saxony and Brandenburg all but ruled ruled northern Germany, as the Emperor devoted most of his energies to fighting in Hungary and Bohemia.
It should also be noted that we are now in the heyday of the "Germany of the princes" as it is sometimes called. The phrase indicates that Germany wasn't really ruled by the Emperor at all but by the great territorial princes like Brandenburg, Saxony and Bavaria. This isn't quite accurate, for the princes still turned to the emperor as their natural leader when faced by an external enemy, such as the Turks or heresy. Within their territories, however, the princes had become all but autonomous, and there was little in terms of law or practical power that could reverse the trend. The temptation—and Sigismund succumbed to it as frequently as any other emperor in our period—was to grant away long-term rights and give protections to the territorial princes in exchange for their help with immediate challenges.