https://en.wikipedia.org/wiki/2015_Russian_Sukhoi_Su-24_shoo...
IMHO Erdogan still owes Putin a favor for being tipped off on the 2016 Turkish coup d'état attempt.
Do you mean the war that Russia wages against Ukraine?
But they didn't. Turkey only upheld the conditions of the Montreux Convention:
https://en.wikipedia.org/wiki/Montreux_Convention_Regarding_...
> Around February 27–28, Turkey refused permission for 3 of 4 Russian warships to enter the Black Sea, as 3 did not have a home base in the Black Sea.
"pursuant to the terms of the agreement, Turkey cannot block Russian warships based in the Black Sea from returning to their registered base."
Turkey was under no obligation to do anything. Yet they closed the straits to Russian ships to the extent that they possibly could.