Original sentence: 803 - Christian Church divides Slovene territory along the Drava river between the Salzburg archdiocese and the Patriarchate of Aquileia.840 - the Balaton Principality emerges in Pannonia.In 610, Avars attempt to invade Italy.The only known duke, Vojnomir, is historically attested in 795
Edited sentence: 10th c.11th c.12th c.13th c.14th c.15th c.610, Avars attempt to invade Italy.796 - The Synod ad ripas Danuvii convoked by Charlemagne's son Pepin and presided over by Paulinus II of Aquileia establishes the Roman Catholic Archdiocese of Salzburg detaching it from the northernmost territory of the Patriarchate of Aquileia.796 The Slovene duke, Vojnomir, aids the Carolingian duke Eric of Friuli against the Avars.798 - Salzburg is raised to the rank of an archdiocese.7th c.811 - The southern boundary of the archdiocese of Salzburg is moved south to the Drava river at the expense of the Patriarchate of Aquileia.840 - The Balaton Principality emerges in Pannonia.8th c.9th c.The synod focuses on the evangelization of the Slovenes