Airsea power is going down. After ever increasing efforts to keep their fleet in Sebastopol, the Russians are finally pulling their fleet back, despite clear and overwhelming airsea dominance over Ukraine. If the Russians are pulling their fleet back from Sebastopol, US airsea bases ringing China are just hostages.
Drone warfare has become dominant, and is rapidly becoming more dominant, rendering grunts trudging through mud increasingly irrelevant. In future war the grunts will be sent in to run up the flag and install supply depots for the drones after the battle is won.
The front line is dissolving, becoming ever deeper, broader, vaguer, and more porous. A multitude of bloggers are trying to figure out where the front line is, and legitimately disagree. Hence the meaningless debate on whether the Ukraine has reached the first line of defence, and on whether they have penetrated it. Troops are spread out more and more thinly, because the closer any soldier is to another soldier, the more likely he is to be identified.
No one knows how to do war of movement yet in a conflict of peer powers. It is all horrifying and terrible war of attrition. The Russians have some bright ideas on how to do an offensive, and are trying them out right now, starting this morning. But they are still pussyfooting around because no one knows how to do it yet. Their basic idea is to shut down enemy movement deep within enemy territory, and then the cut off troops will eventually surrender. We shall see what happens. If it works, the surrender is likely to take quite a while. If it works, no one will know that it is working for a quite a while.
Assassination of enemy leaders is still off the table, but targeted killings are moving steadily and rapidly up the chain of command.
Troops attempting to advance are looking more and more like spies and infiltrators, and less and less like an army on the march. The dissolving front line is likely to foreshadow the front line being everywhere, with battles resembling the sudden manifestation of flash crowd, rather than an army advancing. In retrospect the question of whether the Ukrainians reached the first line of defence is likely to be irrelevant and meaningless.