Ukrainian forces have advanced three to four kilometers into Russia’s Belgorod region, engaging in battles with Russian troops, according to Russian military bloggers and independent analysts.
Military expert Emil Kastehelmi of the Black Bird Group told Reuters Ukrainian troops had penetrated Russia’s first line of defense, though he noted that their ability to launch a major breakthrough remains unlikely.
Pushing a few extra km to take out anti air to make further air strikes possible is probably a big win for them as well.
That’s a whole first line of defense not disrupting or alerting to attacks now.