In the Marines we have a term called "Violence of Action" and every Marine could recite verbatim the Marine rifle company's role, which is to "Locate, Close with, and destroy the enemy by superior firepower and maneuver." This is the basic tenant of Maneuver warfare. The term "violence of action" which is used by most infantrymen and SOF units is a tactic specifically focused on rolling up and hitting enemies in the face to cause panic and hopefully disrupt any plans while preventing them from gaining any breathing room for collecting themselves. This is how we've been successful at hitting HVTs and toppling governments over the past decades. A physical shock and awe if you will, but on the ground not with bombs.
We're seeing the Ukrainians successfully doing this over the past 3 days, and can see the result of this approach. You hit them fast, hard, and then capitalize on the gains and keep hitting them until they force you to stop. We've been hearing a lot of US trainers, US "wargaming" it out with Ukraine, and even the Ukrainian MoD mentioned they were "trying something new" in Kharkiv. So it really makes me wonder if this was the result of those wargaming sessions.