BERLIN (AP) — The U.S. military says it's preparing a massive exercise early next year in Europe involving 20,000 soldiers from the U.S., the largest deployment across the Atlantic for training in more than 25 years.

U.S. European Command said Monday the "Defender Europe 20" exercise from April to May 2020 will support NATO objectives "to build readiness within the alliance and deter potential adversaries." Eighteen countries are expected to take part in exercises across 10 countries, including Germany, Poland, Latvia, Lithuania, Estonia and Georgia.

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