United States
My last arguments.
First, they are doctrinal witch means you cant use them all the time. US has 6 commanders and only one has this mines.
Second, lay 10 mines together? Common man, you have to have tons of time and you can not even shift que them.
In comparison to the other faction mines, they are bad.
You can definitely shift queue them. It takes 3 seconds per mine to build (including the walking distance to get to the next one). Apparently the chance of vehicle crits do not go up past 3 or 4, as elchino said. That's 12 seconds of building something for 20 munitions to damage/destroy an engine. Right now I would consider that one of USF's overpowered abilities.
I asked the "nearby" definition as this word appears around but no one knows what is the distance for "nearby".
What was stated here before is that other two officers just have to be on the field without any distance limit for units they "take care" for.
It seems to me it's not the same with Major. He seems not to get any vet if is not moved out of the main base. So in this case it could be the Major has a "nearby" definition.
It's strange to me, the details we are talking about here, should be very well documented by Relic btw.
Lt's and Captains don't gain experience if they are not "nearby." The distance I'd guess would be around equal or less than the range of their vision.
StonedAssassin
Sir Ringe
Relic Entertainment
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VonManteuffel 
