Talked to a Lt Col friend of mind and ask him his takeThe Brigade that invaded Kursk is the brigade tasked with defending the Sumy area so they are not using some frontline brigade that was seeing combat and whatever brigades following will likely come from sectors that aren't taking part in combat like Kyiv and brigades west of Kyiv.
Having said that this was not some random opportunity they saw and took advantage of this was planned and likely in the works for weeks. What their goal is who knows but it looks like they invaded with a plan and very well prepared for Russian reinforcements. By taking HiMARS and maybe even ATACMS they pretty much have a sorta air support for their offensive and they also learned their lesson from last years failed offensive by using FPV drones to take out Russian attack gunships which wreaked havoc on Ukraine armored vehicles last years offensive. Ukraine already took down 2-3 gunships putting a stop of their use. The lack of Russian attack fighters says that Ukraine likely brought with them couple of mobile PAC-2 launchers and are sitting just over the border with the radar somewhere around Sumy seeing deep inside Russian airspace.
It's going to be interesting these next few days seeing what Ukraine's goal actually is and see if they can still attack Russian columns sent to reenforce.
He said the most obvious motive for doing this is to draw Russian formation out of Eastern Ukraine, the fact that the Russia had massed 15k troop in the region just about 3 months ago, that saying something, maybe they see thru the Russian and thinking they can get away with this? I don't know, that remain to be seen, but whatever they were doing, it seems like they are going according to the Ukrainian plan. Unless it was Russian plan to have them look stupid......
This is a supported attack, they shot down Su-25 fighter and gunship means they have at least some Anti-Air defence in the area, there were report that Russian killed a Ukrainian Buk-2 but that remain to be seen. At this point, nothing seems certain other than the fact that the support level of this attack makes me think this is a long-haul engagement, they are there to fight it out until their position is untenable. No prospective that the Ukrainian can hold on to those gain indefinitely, but if they are holding it now, that mean they are there doing something, as with my last post, we need more time to find out.