A story from a few years ago on the arrest of a senior isis guy in ukraine and the general path of isis guys into ukraine from the mid east
How Ukraine became the unlikely home for Isis leaders escaping the caliphate
Ukrainian authorities announced last week they had arrested a top Isis commander in Kiev in a joint operation with the CIA. He appears to be one of many to have made Ukraine their home
(as a destination for isis fighters leaving Syria) Ukraine offers several advantages over the competition too: the common Russian language, chaos of war, unprofessionalism of local security services, and the low risk of extradition to countries such as Russia.
Mironova estimates “hundreds” of former Isis fighters have decamped to Ukraine. But it is not the numbers that should be of primary concern, she said. The cluster of terrorists in Ukraine were by their nature a “self-selecting” elite: “This isn’t a random selection. The slower guys stop as soon as they get to Turkey. After all, it is a multiple-step operation to get to Ukraine. The ones who get there are the dangerous ones.”
I don't think you appreciate how big a container ship like that is. It is a lot of mass.