 Number two. The U.S. military has raised the security alert at its bases throughout Europe, asking service members to be more vigilant and keep a lower profile. Deputy Press Secretary Sabrina Singh. U.S. European Command is taking steps to increase vigilance for our service members, their families, and our facilities. This was done out of an abundance of caution. Some events impacting the rating include elections in France and the U.K., the upcoming Olympics, and the ongoing wars in Ukraine and Gaza.