Thumpalumpacus
Major
The Taliban ran an excellent offensive, waiting until the exhausted US and Allies fled the field and then marched into Kabul and overwhelmed the terrified defenders, who also fled. It's an offensive to mark the ages. 2021 Taliban offensive - Wikipedia The Ukrainians should be so lucky.
So what you're saying is that playing defense for twenty years set up the conditions for their victory. Got it.
Bear in mind that the main reason why they won was that we'd already decided we were tired of spending blood and money there. Their final offensive was simply the period at the end of a long, run-on sentence.
As for with what, I wrote that the Ukranians need to have an offensive in the works. They can launch it in May or June when much of the heaviest weaponry from the West is in place, but they'd better be preparing to retake lost territory. If Ukraine settles for a defensive strategy they'll lose a lot of territory in the peace.
Little of that donated weaponry is offensive, though. Towed howitzers, Javelins, Stingers, but no airplanes and precious few tanks. Not much transport for their infantry, either.
So again I ask: Go on the offensive with what? What capabilities do you think they can use to carry forward a successful offensive?