The failure of the Ilinden-Preobrazhenie Uprising in 1903 signified a second weakening of the Bulgarian cause resulting in closure of schools and a new wave of emigration to Bulgaria. IMRO was also weakened and the number of Serbian and Greek guerilla groups in Macedonia substantially increased. The Exarchate lost the dioceses of Skopje and Debar to the Serbian Patriarchate in 1902 and 1910, respectively. Despite this, the Bulgarian cause preserved its dominant position in central and northern Macedonia and was also strong in southern Macedonia.