In 1911 he was declared persona non grata in Greece because he refused to agree not to carry on nationalistic propaganda south of Vlora as a condition for cooperation with the Greek authorities against the Ottoman Empire.

[citation needed] Gërmenji led an Albanian guerilla band composed of different religions and social classes fighting against the Ottoman Empire.

[citation needed] Themistokli Gërmenji came to Korçë from Pogradec, which was occupied by the armies of Austria-Hungary and Bulgaria during Austro-Hungarian and Bulgarian occupation of Albania.

[citation needed] Gërmenji was awarded with the Croix de Guerre because he participated in the French capture of Pogradec with the battalion from Korçë.

[3] At the end of 1917 however Gërmenji was accused of collaboration with the Central Powers and summarily executed on 7 November[1] in Thessaloniki after being sentenced to death by a French military court.

[9] It later became clear that the military tribunal had made a grave judicial error, its members having been led astray by Greek informers who wished Germenji removed since he was a powerful Albanian leader.