According to the U.S. Department of Defense, there were U.S. military personnel deployed to over 150 countries worldwide. The following are some of the countries where the U.S. has a significant military presence:

1. Japan: The U.S. has over 50,000 troops stationed in Japan, mainly on the islands of Okinawa and Honshu.

2. South Korea: The U.S. has approximately 28,500 troops stationed in South Korea, mainly in and around the capital city of Seoul.

3. Germany: The U.S. has around 36,000 troops stationed in Germany, mainly in the states of Bavaria and Hessen.

4. Italy: The U.S. has approximately 12,000 troops stationed in Italy, mainly at the U.S. Army Garrison Vicenza and the Naval Support Activity Naples.

5. Afghanistan: As of September 2021, there were around 2,500 U.S. troops in Afghanistan, down from a peak of over 100,000 in 2011.

6. Iraq: As of September 2021, there were around 2,500 U.S. troops in Iraq, down from a peak of over 170,000 in 2007.

7. Kuwait: The U.S. has around 13,000 troops stationed in Kuwait, mainly at the Camp Arifjan military base.

8. Qatar: The U.S. has around 13,000 troops stationed in Qatar, mainly at the Al Udeid Air Base.

9. Djibouti: The U.S. has around 4,000 troops stationed in Djibouti, mainly at Camp Lemonnier.

It's worth noting that the number of troops stationed in each country can fluctuate due to changing circumstances and mission requirements.
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