The US may be sending military advisors to Georgia. So where is where is Georgia? On the southern border of Chechnya with ports on the Black Sea.

Chechnya is a mess.
Chechnya has been a mess for a long time.
Chechnya is full of oil.

This has the potential to get much uglier. US Troops are already in Saudi Arabia and Turkmenistan/Uzbekistan/Afghanistan, adding Georgia surrounds Iran on three sides. Iran is without a doubt the strategic linchpin of the Middle East, bordering on Iraq, Afghanistan, Turkey, Pakistan, The Persian Gulf, The Caspian Sea and the Gulf of Oman. Even Saudi Arabia doesn’t control as much geographic importance or influence. If Iran is a target, and it seems that they are, moving troops to Georgia now has them surrounded on three sides.

Troops in Georgia would also likely open the Black Sea to US/NATO war and supply ships. These supplies could be moved by land across Geogia, placing them very close to the Caspian Sea. Tehran is basically sitting on the southern coast of the Caspian Sea. The Caspian Sea is also full of oil.

The whole big mess is becoming more and more about oil, for the US and Russia. The world is running out of oil and there’s not much to replace it yet.