Kachaks is a term used for the Albanian rebels active in the late 19th and early 20th century in northern Albania, Montenegro, Kosovo and Macedonia, and later as a term for the militias of Albanian revolutionary organizations against the Kingdom of Serbia (1910–18) Kingdom of Yugoslavia (1918–24), called the "Kaçak movement".

The Committee for the National Defence of Kosovo was an Albanian organization founded in Shkodër on 1 May 1918. It mainly consisted of the political exiles from Kosovo and was led by Hoxha Kadri from Pristina. It existed in looser form since May 1915.