War breaks out between the Hungarians and the Pechenegs, but a peace is concluded after the news of a Bulgarian attack against their territories, coming a town (probably Belgrade). The Hungarians and the Pechenegs decide to attack this town.

The Hungarian-Pecheneg army defeats, in the Battle of Wlndr, the relieving Byzantine-Bulgarian forces then conquer the city, and plunder it for three days. The allies plunder Bulgaria, then head towards Constantinople, where they camp for 40 days, and sack Thrace, taking many captives. The Byzantine Empire concludes a peace treaty with the Hungarians, ransom captives, and accepts to pay tribute to the Principality of Hungary.