Trying to calculate/guess how many troops are participating in the fight directly on behalf of the Ukrainians at the three active sectors of the Zaporyozhia. 

A. Kamyanska
- 130th Reconnaissance Battalion
- 128th Mountain Assault Brigade
And perhaps 8th Separate Battalion Aratta which is an intelligence unit, so not sure they count anyway.

B. Orikhov
- 118th Mechanized Brigade
- 47th Mechanized Brigade
And perhaps 11th Brigade of Ukrainian National Guard.

C. Velyka Novosilka
From the West:
- 74th Reconnaissance Battalion
Probably 23rd Mechanized Brigade, and
probably 3rd Tank Brigade
Towards South:
- 35th Marine Brigade
- 129th Territorial Defense Brigade
And perhaps 128th Territorial Defense Brigade
And perhaps 31st Mechanized Brigade
And perhaps Airborne Battalion, 25th Airborne Brigade
- 68th Jager Brigade
- 4th Tank Brigade
- 37th Marine Brigade

Soooo.
That's 8 brigades and couple of battalions pocket change, for sure.
Then 2 more brigades probably.
And 3 more brigades, and couple of battalions pocket change.
So about 13-14 brigades (if I group the battalions together).
But I'm just guessing which units are involved and many more are nearby and they could participate earlier, or just parts of them.
I'm not sure I want to count the artillery units there, although it's sure they are there to give support.
Anyway, one brigade is about 2000-4000 troop strong I think. But even on paper it can vary, in practice they are always less in a war than on paper. So let's say 3000 troops (I think the prepared brigades consist of ~3500 men, but tank brigades are less for sure*, and probably territorials too).
That's 24-42000 soldiers. Can this be right?

*Forbes article from 2022 Dec. says ~2000 are in the 1st Tank Brigade
https://www.forbes.com/sites/davidaxe/2022/12/25/how-ukraines-1st-tank-brigade-fought-a-russian-force-ten-times-its-size-and-won/

 >>/50466/
Air force isn't just fighter jets though. Or the big bombers. Air force also the helicopters destroying targets from 5-10 kms away. Or transporting stuff and people. Russians can move more or less freely in the air over their zone of control.