Ukraine's president has recently warned Russian tanks are amassing along the border between the two countries amid increasing tensions. The comments came late last month after three Ukrainian naval boats were seized in the Kerch Strait by Russia.

President Petro Poroshenko has allegedly shown images of what he claims to be hundreds of tanks preparing for an invasion.

https://www.zerohedge.com/news/2018-12-09/new-satellite-imagery-shows-hundreds-russian-battle-tanks-amassing-ukraine-border