Russian Forces
Advance: 1.88 km²
Advance = 1.88km2
Over in Kupyansk, we now have the answer to the question from the previous update of whether Russia managed to get a foothold, or Ukraine drove them out. Contrary to the many Ukrainian claims, Russia was successfully able to reinforce the troops that broke into the city, and has established an area of control on either side of the railway, capturing the forest/field area north of Kupyansk, as well as the Fodder plant and other industrial buildings. Clashes are currently occurring over the Sugar Plant, Dairy Canning Plant, and metal plant, with Russian assault groups trying to rapidly expand their area of control. Some troops even managed to reach the main road to the western side of Kupyansk, although they were captured (note the 2 Ukrainian tanks).
The battle for Kupyansk has now begun in earnest, far quicker than I or many other thought possible. Ukraine is in quite the precarious situation here, having failed to properly protect the northern side of Kupyansk and letting Russia cross the Hnylytsya River unopposed. Because Ukraine has its forces spread out in battles in other parts of this front, they were not in position for fighting to begin in Kupyansk itself, which has let Russia make quick progress. Ukraine is having to pull back some of it troops and equipment from the other parts of the front back into Kupyansk itself to defend the town, which will complicate the situation in those areas. Whilst Ukraine can obviously still pull back to the western side of Kupyansk, and thus can always stabilise, doing so would doom the rest of the Kupyansk front and all their positions on the eastern side of the Oskil River, as without eastern Kupyansk supplying the thousands of troops there would be impossible.