A surprise two-pronged offensive by Ukrainian forces is reshaping the battlefield and forcing the Russians to scramble for reinforcements.

Driving the news: Ukraine launched its long-awaited push on Kherson in southern Ukraine last week, before following up with a rapid advance near Kharkiv in the northeast that seems to have caught Vladimir Putin's troops by surprise.

"Shoot low sheriff, I think he's riding a shetland!" B. Wills