Officials: Russia at 70 % of Ukraine military buildup

U.S. officials have said in recent weeks that a Russian invasion could overwhelm Ukraine's military relatively quickly.

Russia has assembled at least 70 % of the military firepower it likely intends to have in place by mid-month to give President Vladimir Putin the option of launching a full-scale invasion of Ukraine, U.S. officials say.

The officials, who discussed internal assessments of the Russian buildup on condition they not be identified, sketched out a series of indicators suggesting Mr. Putin intends an invasion in coming weeks, although the size and scale are unclear. They stressed that a diplomatic solution appears to remain possible.

Among those military indicators: an exercise of Russia's strategic nuclear forces that usually is held each fall was rescheduled for mid-February to March. That coincides with what U.S. officials see as the most likely window for invasion. The officials made no suggestion that a prospective conflict would involve the use of nuclear weapons, but the Russian exercise — likely involving the test-launching of unarmed long-range missiles on Russian territory — could be used as a message aimed at deterring the West from intervening in Ukraine.