Sept 30, 2015: Russia warplanes bomb Syria for the first time targeting Homs and Hama.
October 2: Turkey accuses Russia of targeting moderate rebel groups like the Free Syrian Army.
October 3: Russian warplanes violate Turkish airspace in two separate incidents. Turkey warns Russia that it would be responsible for any consequences if it happens again.
October 5: Nato holds an emergency meeting and warns Russia over violating Turkish airspace.
October 6: Russia ignores warnings and violates Turkey’s airspace for a third time.
October 16: Turkey says it shot down a Russian surveillance drone.
November 20: Turkey summons its Russian envoy over his country’s targeting of Turkmen villages in Syria’s Latakia province.
November 22: Turkey prevents Russia from using its airspace to ship weapons to Iraq.
November 24: Turkey shoots down Russian war plane accusing it of violating its airspace once again.
November 28: Russia slaps economic sanctions on Turkey. It also asks Russian tour operators to refrain from selling trips to Turkey, normally a top holiday destination for Russian tourists.
November 30: Turkey stands firm and refuses to apologise. Erdogan says it’s every nation’s right to defend their airspace.
June 27, 2016: Turkey says it regrets the downing of the Russian fighter jet and moves to mend ties.
June 29: 41 killed in a terrorist attack on Istanbul’s Ataturk airport.
July 6: Russia says Ataturk attack “result of Turkey ignoring Moscow’s signals about “terrorists” hiding in Europe and Turkey.
July 15: Attempted military coup in Turkey fails as Erdogan supporters rush to his defence.
August 9: Erdogan in Moscow making Putin the first world leader he meets following a souring of ties with Western countries over his crackdown following the coup.