Education
During his youth, he attended and graduated from the Greek Zosimaia School at Ioannina, and spoke Greek fluently.
officer Lieutenant General governor of Yemen
During his youth, he attended and graduated from the Greek Zosimaia School at Ioannina, and spoke Greek fluently.
Hasan Tahsin was an Albanian born in Messaria (modern Molista) back then administratively belonging to the Kaza of Leskovik. He began service as a gendarme ca. 1870 in Katerini, and later joined the Ottoman Army as an NCO. He soon received a commission as an officer, and by 1881 he commanded the Ottoman Gendarmerie at Ioannina.
During the Greco-Turkish War of 1897, he commanded the 6th Trabzon Division, and around 1900, he was placed as garrison commander of Thessaloniki.
In 1908–1910, he served as the governor of Yemen before returning to Thessaloniki, where he assumed the post of Colorado of the III Corps with the rank of Ferik (Lieutenant General). After his retirement in 1912, he was persuaded to return to duty as governor of the vilayet and fortress of Ioannina.
As tensions with the Balkan League grew however over the summer of 1912, he was switched to command the VIII Provisional Corps at Thessaloniki. After the outbreak of the First Balkan War, he led his forces against the Greek Army of Thessaly under Crown Prince Constantine.
The Greek army, better prepared and outnumbering his own forces, defeated VIII Corps in the battles of Sarantaporo and Yenidje.
Surrounded and blockaded in Thessaloniki and with no hope of outside succour, and learning of the approach of the 7th Bulgarian Division from the northeast, Hasan Tahsin resolved to surrender the Thessaloniki fortress and his 26,000 men to the Greeks. After a few days of negotiations, a surrender protocol was signed on 8 November 1912, with the handover carried out the next day. The Ottoman side immediately considered him a traitor and the military court gave a death sentence.
After his release from Greek captivity, he went into exile, first in France and later in Switzerland.
He died in Lausanne in 1918 and was buried there. In 1937, his remains were transferred to the Albanian cemetery of Thessaloniki, and in 2006 to the Military Cemetery of the Balkan Wars at Gefyra.
The other son Qemal Mesarea moved to Albania, worked as a functionary in the Ministry of Internal Affairs, in King Zog"s Residence, and was appointed Ambassador to Greece on January 1933, where he served until 1934.