Key moments

Some of the main events:

2022

Feb 24: Russian

President Vladimir Putin launches special military operation in Ukraine.

May 18: Finland and Sweden submit their official applications to join NATO.

July 22: Russia and Ukraine separately signed a deal with Turkiye and the UN on grain exports.

Sept 26: Nord Stream pipeline explosions occur off the Baltic island of Bornholm.

Oct 8: A truck laden with explosives blows up on the bridge linking Crimea to Russia's mainland.

Dec 21: Ukrainian President Volodymyr Zelensky visits the US, meeting US leader Joe Biden.

2023

Feb 20: Biden makes a surprise visit to Kyiv.

Feb 21: Putin delivers an annual address to the Federal Assembly.

Agencies - Xinhua