The following is the March 12, 2019 Congressional Research Service report, United States European Command: Overview and Key Issues.
From the report
Over the past 25 years, decisions regarding U.S. basing and posture in the European theater have largely reflected these assumptions. The bulk of U.S. forces in Europe have been withdrawn (as of FY2018, approximately 74,000 military service members were assigned to EUCOM and its subordinate commands; see below). Many bases and outposts were either consolidated or closed. However, two Brigade Combat Teams (BCTs) were retained (in Italy and Germany) as were some naval bases, particularly those along NATO’s southern flank, and a number of air force bases that were deemed critical for supporting operations in the Middle East, Africa and Europe.
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