Deterrence was the linchpin of U.S. defense strategy for decades, but the political and military context for deterrence has changed significantly. Instead of a single, near-peer opponent, the U.S.

They include troop size, location and, crucially, military options in the event ... safeguard Ukraine by establishing a reassurance and deterrence force to dissuade Russia from invading again.

In this photo provided by Ukraine’s 65th Mechanised Brigade press service, Ukrainian servicemen train at the military training ... a reassurance and deterrence force to dissuade Russia from ...