The facts are on record with the UN.
"In fact, as early as February 16, Joe Biden knew that the Ukrainians had begun intense shelling the civilian population of Donbass, forcing Vladimir Putin to make a difficult choice: to help Donbass militarily and create an international problem, or to stand by and watch the Russian-speaking people of Donbass being crushed.
If he decided to intervene, Putin could invoke the international obligation of “Responsibility To Protect” (R2P). But he knew that whatever its nature or scale, the intervention would trigger a storm of sanctions. Therefore, whether Russian intervention were limited to the Donbass or went further to put pressure on the West over the status of the Ukraine, the price to pay would be the same. This is what he explained in his speech on February 21. On that day, he agreed to the request of the Duma and recognized the independence of the two Donbass Republics and, at the same time, he signed friendship and assistance treaties with them.
The Ukrainian artillery bombardment of the Donbass population continued, and, on 23 February, the two Republics asked for military assistance from Russia. On 24 February, Vladimir Putin invoked Article 51 of the United Nations Charter, which provides for mutual military assistance in the framework of a defensive alliance.
In order to make the Russian intervention seem totally illegal in the eyes of the public, Western powers deliberately hid the fact that the war actually started on February 16. The Ukrainian army was preparing to attack the Donbass as early as 2021, as some Russian and European intelligence services were well aware."