Hi Tavit Bey,
this is a beautiful old song called "Yemen Turkusu" (the folk song of Yemen). It is very sad, it tells about people of the town of Mus ("Burasi Mus'tur" , not hustur!) who are lamenting about their sons or husbands who left them as soldiers in order to go to save Yemen which had been part of the Ottoman empire of over 4 centuries, to save it from the joint assault of Arabs and English.
Most died there and never came back...
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(native Turkish professional translator)