2nd Armored Brigade combat team commander Colonel Patrick S. O'Neal, during a press conference in Drawsko PomorskiePhoto: PAP/Marcin Bielecki
Over 20,000 American soldiers are expected to take part in the Defender-Europe 20 exercises, the largest of their kind in the last 25 years.
The manoeuvres are under way in Poland and the Baltic states.
Tomasz Ferenc has more...