A breakaway region in Europe is asking Russia for protection. Here’s what to know

Pro-Russian rebels in a separatist sliver of Moldova have asked President Vladimir Putin to protect their region from what they claim are threats from Moldova’s government.

Transnistria, which illegally split from Moldova as the Soviet Union crumbled, has remained firmly within the Kremlin’s orbit while Moldova, which borders Ukraine, is bidding to join the European Union.

In a special congress on Wednesday, politicians in Transnistria asked Moscow to guard it from “increasing pressure from Moldova,” and the Kremlin later said protecting its “compatriots” was a priority, Russian state media RIA Novosti reported....