NATO Allies are deeply concerned about the high levels of violence caused by the Taliban's offensive, including attacks on civilians, targeted killings, and reports of other serious human rights abuses
Russia's embassy in Washington called last week for the drills to be cancelled, and the Russian defence ministry said it would react if necessary to protect its own national security.
Relations between Kyiv and Moscow plummeted after Russia seized Crimea and over Russia's support for a separatist rebellion in eastern Ukraine.