Marshal Foch, September 1918 -
“Tout le monde à la bataille”
?
Just speculation -
Like the situation Marshal Foch (Allied Supreme Commander on the Western Front, 1918) faced, it may be the Ukrainians perceived the the Russian reserves are exhausted. Advancing everywhere may create exploitable cracks in the front in several places, which the Russians, without reserves, will be unable to plug up, and which the Ukrainians plan to exploit.
I assume that by doing this the Ukrainians hope to, as Foch did, get the Russians to start withdrawing troops, piecemeal, and turn it into a mobile battle, where the Ukrainians will have an advantage. Based on the Ukrainian performance over the last month they have good reasons to believe this would work.
Of course this all depends on the usual military if, if, if’s. However, if it does work, and given what’s happening elsewhere, we could be seeing the end of this war.