The division was formed from the "Gorička", "Simon Gregorčič" and the First Soča Brigade.

In first half of March 1944, it attacked German communication lines in the Upper Soca Valley.

After that, it operated in the Cerkljanska region, around Idrija and in the Vipava Valley.

In February and March 1945, it was engaged in heavy battles around Trnovski gozd, especially during the last German offensive Unternehmen Rübezahl III against the 9th NOVJ Corps, in the second half of March 1945.

At the beginning of April 1945, the 30th Division managed to break through the German encirclement, but suffered considerable losses.