Polish and U.S. troops are taking part in live-fire exercises in northern Poland that are part of a NATO operation showing its commitment to the region's security.

"Operation Atlantic Resolve" was launched in April 2014 in Poland and in the Baltic states and is expected to expand in the region.

Some 550 troops of the Germany-based U.S. Army 2nd Cavalry Regiment and 75 Stryker combat vehicles are taking part, along with the host nations' troops.

On Wednesday in Poland, live-fire training is taking place on a test range in Drawsko Pomorskie, also involving troops from Poland's 12th Mechanized Division.

The enhanced presence of U.S. troops along NATO's eastern flank is to "continue at least through the end of 2015," U.S. Embassy in Poland spokesperson Shawn O'Hara said.