Hey!
Health and other stuff can be found here:
http://www.easternfront.org/?p=units The list is not up completely up to date, but you'll get a general idea of each unit.
About the Command Squad aka Danko:
Offensive vet gives a global +10/+5/+5% damage bonus or a -10/5/5% received damage for offensive/defensive vet 1/2/3. If you mix the values add up.
Example 1: vet 1 off/vet 2 def/vet 3 def = +10% damage and -10% received damage.
Example 2: vet 1 def/vet 2 def/vet 3 off = -15% rec. damage and + 5% damage.
I hope this helps you
Greetings