It started before February 2022:

"The overthrow of the democratically elected and neutralist President of Ukraine by a U.S. coup in February 2014 and installation by the U.S. of a rabidly anti-Russian regime instead, was done with the ultimate objective of posting U.S. nuclear missiles there against The Kremlin. The war in Ukraine started with that very bloody U.S. coup."
 https://ericzuesse.substack.com/p/what-provoked-russias-unprovoked#:~:text=The%20overthrow%20of,S.%20coup.