[1][3] Upon the declaration of general mobilization by the Kosovo Liberation Army, Beqiri joined the ranks of the KLA.

Like many others, Beqir initially became involved in the struggle of the Liberation Army for Presevo, Medvegja, and Bujanoc (LAPMB).

During the Preševo Valley conflict, he held a prominent position within the 113th Brigade "Ibrahim Fejzullahu" in the Upper Zone of Presevo, where he served as the commander of the artillery squad.

[2][3] Following the decision to demobilize after the signing of the Končulj Agreement in May 2001, Beqir Sadiku returned to his homeland, now representing the emblem of the National Liberation Army.

[1][2][3][4] After the withdrawal of Macedonian troops in the Lipkovo-Karadak region, Beqiri, together with a significant portion of the 113th Brigade, captured Aračinovo on June 12, 2001.