Recent presentation about Nozh ERA
Recent conference of armored vehicles presented research / observation data for Ukraine Nozh ERA.
http://sd.net.ua/2020/01/20/donbass-tanki-artylleriya.html
https://diana-mihailova.livejournal.com/4420448.html
I'm relying on google translator.
Most of the armored vehicles were destroyed or damaged by artillery (total 45% of armored vehicle damage)
Nizh ERA successfully defended against 3BM42 Mango and 152mm top attack EFP (probably from ICMs)
Ukraine researchers
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IMO the only imaginable scenario of a restart of hostilities today is if Ukraine decides to bomb out and overrun L/DNR forces. But observing ongoing discussion in Ukrainian society it seems to be too real.
In terms of geography I believe it will hardly extend much beyond current L/DNR area. But in terms of systems employed IMO it may be a repetition of Georgia - tactical ballistic and cruise missiles, heavy air campaign etc. Ukraine has limited Air Force - like ten times smaller than Russ