Ukraine puts troops along Crimean border on combat alert

Russian President Vladimir Putin chairs a government meeting in the Kremlin in Moscow, Russia, Wednesday, Aug. 10, 2016. (Alexei Druzhinin/Sputnik, Kremlin Pool Photo via AP)

Ukraine’s Poroshenko warns of ‘full-scale’ Russia invasion

Ukraine President Petro Poroshenko

President Petro Poroshenko has told MPs the military must prepare to defend against a possible “full-scale invasion” from Russia, amid a surge of violence in eastern Ukraine

1,500 Russian troops, military equipment enter Ukraine

Ukrainian servicemen patrol with a self-propelled artillery gun near the eastern Ukrainian town of Debaltseve, in the region of Donetsk , on February 8, 2015. (photo credit: AFP/VOLODYMYR SHUVAYEV)

Soldiers pour across the border in conflict-ravaged breakaway region

Russian-backed rebels massing to attack key Ukrainian towns: Kiev

A municipal official looks through the window of a residential block, which was damaged by a shelling on Wednesday according to locals, in Donetsk, Ukraine, February 5, 2015. Credit: Reuters/Maxim Shemetov

Death toll mounts in Ukraine fighting after peace talks fail

Pro-Russian separatists ride on a tank in Donetsk, eastern Ukraine, February 1, 2015. REUTERS/Maxim Shemetov

NATO leader sees ‘serious military buildup’ in Ukraine

NATO Secretary General Jens Stoltenberg speaks during a news conference in Kabul November 6, 2014. REUTERS-Omar Sobhani

Russian troops enter Ukraine – Nato

Column of Russian tanks heading towards Donetsk

Nato has seen columns of Russian military equipment and Russian combat troops entering Ukraine this week, its top commander said

Tank column crosses from Russia into Ukraine: Kiev military

FILE: Pro-Russian separatists stand in formation in front of a Soviet World War Two T-34 tank, as they take an oath of loyalty to the separatist Interior ministry in Donetsk, eastern Ukraine, October 25, 2014. (REUTERS/Maxim Zmeyev)

Vladimir Putin wants to destroy us and restore Soviet Union, says Ukraine PM

Vladimir Putin ‘wants another frozen conflict’, says Arseny Yatseniuk. Photograph: Mikhail Klimentyev/AFP/Getty Images

Arseny Yatseniuk tells European leaders Ukraine is in ‘stage of war’ with Russia as renewed clashes broke out in east

Nato Summit 2014: Secretary General Says International Community Has ‘Obligation’ to Stop Isis

Nato Secretary-General Anders Fogh Rasmussen speaks to the media at the Celtic Manor resort, near Newport, in Wales September 4, 2014.