A State Department travel advisory on Saturday said most American staff at the Kyiv embassy have been ordered to leave and other U.S. citizens should depart the country as well.
Further U.S.-Russia tensions arose on Saturday when the Defense Ministry summoned the U.S. embassy’s military attache after it said the navy detected an American submarine in Russian waters near the Kuril Islands in the Pacific. The submarine declined orders to leave, but departed after the navy used unspecified “appropriate means,” the ministry said.
Adding to the sense of crisis, the Pentagon ordered an additional 3,000 U.S. troops to Poland to reassure allies.
Sullivan said Americans in Ukraine should not expect the U.S. military to rescue them in the event that air and rail transportation is severed after a Russian invasion.
Several NATO allies, including Britain, Canada, Norway and Denmark, also asked their citizens to leave Ukraine, as did non-NATO ally New Zealand.
Sullivan said Russian military action could start with missile and air attacks, followed by a ground offensive.
“Russia has all the forces it needs to conduct a major military action,” Sullivan said, adding that “Russia could choose, in very short order, to commence a major military action against Ukraine.” He said the scale of such an invasion could range from a limited incursion to a strike on Kyiv, the capital.
Russia scoffed at the U.S. talk of urgency.
“The hysteria of the White House is more indicative than ever,” said Maria Zakharova, a Russian Foreign Ministry spokeswoman. “The Anglo-Saxons need a war. At any cost. Provocations, misinformation and threats are a favorite method of solving their own problems.”
Zakharova said her country had “optimized” staffing at its own embassy in Kyiv in response to concerns about possible military actions from the Ukrainian side.
In addition to the more than 100,000 ground troops that U.S. officials say Russia has assembled along Ukraine’s eastern and southern borders, the Russians have deployed missile, air, naval and special operations forces, as well as supplies to sustain a war. This week, Russia moved six amphibious assault ships into the Black Sea, augmenting its capability to land marines on the coast.
Biden has bolstered the U.S. military presence in Europe as reassurance to allies on NATO’s eastern flank. The 3,000 additional soldiers ordered to Poland come on top of 1,700 who are on their way there. The U.S. Army also is shifting 1,000 soldiers from Germany to Romania, which like Poland shares a border with Ukraine.
Russia is demanding that the West keep former Soviet countries out of NATO. It also wants NATO to refrain from deploying weapons near its border and to roll back alliance forces from Eastern Europe — demands flatly rejected by the West.
Russia and Ukraine have been locked in a bitter conflict since 2014, when Ukraine’s Kremlin-friendly leader was driven from office by a popular uprising. Moscow responded by annexing the Crimean Peninsula and then backing a separatist insurgency in eastern Ukraine, where fighting has killed over 14,000 people.
A 2015 peace deal brokered by France and Germany helped halt large-scale battles, but regular skirmishes have continued, and efforts to reach a political settlement have stalled.