Believe me I have searched for and read many articles on this question but I can't exactly pinpoint the crux of this matter. They just keep going round and round in circles without hitting the nail on the head.
I know I'm not alone on this so pls, if you can help me(us) out I'll be grateful. I really want to know pls.
Just brief and straight the point. Thanks.

Russia and Ukraine share borders.

Russia doesn't want Ukraine to join NATO because it will pose security threat to Russia but Ukraine say it must join.

Na wetin cause the fight be dat.

Better. Thanks man
@LeoDeKing

[s]

LeoDeKing:
Russia and Ukraine share borders.

Russia doesn't want Ukraine to join NATO because it will pose security threat to Russia but Ukraine say it must join.

Na wetin cause the fight be dat.

[/s]

Putin have a dream that one day, the old Soviet union will be brought back

So that second wave of hunger will finish people

LeoDeKing:
Russia and Ukraine share borders.

Russia doesn't want Ukraine to join NATO because it will pose security threat to Russia but Ukraine say it must join.

Na wetin cause the fight be dat.

You're correct, although you just said half of the story... You see the war ain't really about Ukraine but for Russias self preservation... If/when Ukraine becomes a member of NATO, automatically the US will set-up a base in Ukraine and ofcourse Russia will never sit idly by and watch the US set-up shop in their backyard, there'll always be that mutual suspicion. So you see the war isn't really about Ukraine...