Whilst I don't consider Wikipedia completely infallible I believe that these days it is a reasonably good source of accurate information. This is because whilst anyone can contribute to increase the base of knowledge it is also subject to the possibility of review and correction by users (peer review) . In most cases entries have to be confirmed by other independent sources but may also be subject to review by Wikipedia staff or volunteers. The system is not perfect and can sometimes be circular: I found one entry (regarding Moto Guzzi) that had been "verified" by quoting as a source an "independent" Web page which, as it turned out, was simply quoting the unverified earlier version of the (disputed) Wikipedia entry.
I will quickly say that it is far from my only source of information but it does often lead to further searches for information from other published sources.
Having said all that I strongly recommend the reading of some of the Wikipedia entries regarding Ukraine. I would suggest:
https://en.wikipedia.org/wiki/Ukraine a general overview of the history of Ukraine which, in view of the current conflict makes interesting reading.
https://en.wikipedia.org/wiki/Holodomor "genocide by starvation" inflicted by Stalinist Russia on the Ukrainian people.
https://en.wikipedia.org/wiki/Euromaidan which gives a good deal of information on the lead up to the Russian invasion and annexation of Crimea in 2014.
https://en.wikipedia.org/wiki/Minsk_agreements interesting background to the conflict from 2014 to the full scale Russian invasion.
It should also be noted that there has been substantial re-settlement of Russians which has replaced Ukrainians forced out of Eastern Ukraine and more recently out of the occupied territories. This is quite similar to what has happened in the past, even quite recently in other countries. An intentional ethnic shift of territory gained by force. This is in addition to the more natural cross border mix and immigration of people in border zones.
