Brigade sized units/a Reinforced Company of tanks involved in fighting in Ukraine.

We're all focused on Iraq but things are definitely still smoking in Ukraine.  Check this out...via The Daily Star.

One military source said 4,000 separatists were involved, while rebels sources in Donetsk said Ukrainian infantry supported by 20 tanks and many other armored vehicles were storming the village of Yampil, about 12 km east of Krasny Liman.
A top rebel commander, Igor Strelkov, reported “heavy losses” in equipment and arms among the separatists, faced with a huge superiority in heavy armor on the government side at Yampil.
“We beat off the first attack and destroyed one tank. But it is difficult to take on 20 tanks. The battle is going on. Our people are holding but we can’t rule out that they [government forces] will break through,” Strelkov, who is also known as Girkin, said in a statement caught on video. He urged Moscow to “take some measures.”
There was no word on casualties from the government side.
From the nearby town of Siversk, artillery blasts, small arms fire and machinegun-fire could be heard from about 3 km away. From high ground, smoke could be seen billowing from rebel positions under attack.

For all those saying that this isn't a civil war I say bullshit.

4,000 separatists?

20 Tanks?

Assuming that the attacking side has at least an equal number of  Infantry then you're talking about some major force on force action here.   How this isn't on mainstream news is beyond me but this is getting interesting.