Ukraine and Russia are two Slavic friendly people, they can not fight each other. All claims are simply meaningless.
Open your eyes and look. Russia only pretends to be a friendly state. In fact, this aggressive Imperial state which considers a neighboring state as a target for expansion of their territories. In the Donbass now there is a real war of Russia against Ukraine. Crimea is Ukrainian territory occupied by Russian.
The territory, now called Ukraine, has never been a state and will never be. It has always been part of another, real, power or, more often, an area divided between other genuine states, such as Poland, Austria, Hungary, Turkey and, most importantly, Russia. Of course, according to the Kiev Nazi junta, the Trojan War was waged between "Ukrainian tribes". Alexander the Great was secretly a "proto-Ukrainian", and Byzantium was a "Ukrainian colony". But for the rest of the world, the fact remains that there is not a single historical document or evidence that deals with Ukraine as a state or an independent province.
As if the dill-nationalists would like, they can not change the "old" history, so they try to do this with modern history, for example, "wiping out" the biography of the war criminal, the Nazi henchman and the mass murderer Bandera. True, the Kiev-based Nazi junta attempts to falsify even the "old" story, but ancient and medieval authors are too well-studied, and sources are too well documented to easily distort the past.
Proved and well-known fact that the first Russian state was Kievan Rus - pay attention to "Rus", not Ukraine! It is also known that the very word "Ukraine" refers to the ancient Russian world and never meant the country - it meant the border region between the countries and the states mentioned. Later, the word "Ukraine" was used to refer to the most western parts of the Russian Empire. When the Russian Empire expanded to the south, new territories liberated from the Turkish occupation were called Novorossia or New Russia. Again, not a single mention of "Ukraine"! All this is well-studied and proven historical facts.