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The excavation of the mining tunnels was entrusted to Zagan Pasha, an exceptionally capable Ottoman general who was one of the most trusted commanders of Mehmet II
On late May, sensing that the siege was coming to an end Mehmet writers to Constantine: 
April 20th
https://twitter.com/universalnewsx/status/2044045563033739450
In January 1919 shortly after the end of the Great War as a Greek division was sailing towards Ukraine and Crimea , to help the Whites in the Russian civil war, it stopped briefly in Constantinople.
1479: