I think the Ukrainian defense minister said that if Ukraine was given 500 tanks, 1000 armored IFV/SPG, and aircraft, they could retake all of their territory in a month. Biden/Scholz etc keep saying that would be "escalatory." Well, "escalatory" is exactly what you call this referendum/annexation bs.
So I say fly over 10,000 Ukrainians for 3 months training, pull up to 2000 older generation Abrams, Bradleys, LAV-25s, Stryker, M109s, etc. out of Sierra Army Depot where they are kept in working order. Get logistic supply lines and maintenance bases in Poland set up using US contractors to assist and train additional Ukrainians. If they rush it, the Ukrainians could be set for major winter offenses come January when the ground is rock hard and perfect for heavy armor. The miserable, half frozen, untrained, under equipped Russian defenders wouldn't even put up a fight.