Here’s the US military footprint in the Black Sea region
By: Kyle Rempfer  
After Russia fired on two Ukrainian naval ships Sunday, seizing the vessels and crew members, tensions on Russia’s doorstep appear to have reached a fever pitch.
The incident took place in the Kerch Strait — a key waterway to both countries that bridges the Sea of Azov and the Black Sea.
And while Ukraine is not a NATO ally, members of the Western alliance have issued formal condemnation of Russia’s actions, which appeared to be unprovoked.
https://www.militarytimes.com/news/your-army/2018/11/27/heres-the-us-military-footprint-in-the-black-sea-region/