<Ul> <Li> West <Ul> <Li> A Hungarian army raids in the environs of Metz in Lothariniga . </Li> </Ul> </Li> <Li> Balkans <Ul> <Li> War between the Hungarians and the Pechenegs but a peace is concluded after the news of a Bulgarian attack against their territories, coming from the town of W.l.n.d.r (probably Belgrade). The Hungarians and the Pechenegs decide to attack this town . </Li> <Li> April--The Hungarian - Pecheneg army defeats in the Battle of W.l.n.d.r the relieving Byzantine - Bulgarian forces, then conquer the city, and plunder it for three days . </Li> <Li> May--June--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 the captives, and accepts to pay tribute to the Principality of Hungary . </Li> </Ul> </Li> </Ul> <Li> West <Ul> <Li> A Hungarian army raids in the environs of Metz in Lothariniga . </Li> </Ul> </Li> <Ul> <Li> A Hungarian army raids in the environs of Metz in Lothariniga . </Li> </Ul> <Li> A Hungarian army raids in the environs of Metz in Lothariniga . </Li>

Who was not one of the groups that attacked europe during the 9th and 10th centuries