Well, already in April 2008 Ukraine got a pledge in Bucharest that they "will become" a member of NATO, which is before the mess in Crimea and Donbass and even before Georgia got smacked which are the usual examples of Russian early aggression.
There's also Putin's 2007 speech in Munich about them being really pissed with how they are treated, does that count? Other than that there's the second Chechen war and maybe the time the Russians rushed some peace keepers into Kosoy.
There's also Putin's 2007 speech in Munich about them being really pissed with how they are treated, does that count? Other than that there's the second Chechen war and maybe the time the Russians rushed some peace keepers into Kosoy.