Following Svatopluk's death, Great Moravia, which had achieved its maximum territorial extension, and exercised its greatest influence in his reign, ceased to be a political factor in Central Europe. Among the conquered peoples, the Czechs were the first to withdraw in 895. Although--at least, according to the testimony of the Byzantine Emperor Constantine Porphyrogenitus--Svatopluk had made a deathbed request to his sons, Mojmir II of Moravia and Svatopluk II, that they remain united, after his death internal disagreements between them were fostered by Arnulf. Finally Moravia collapsed in the first decade of the 10th century due to the invasion of the Hungarians.