The decision was taken by General Philip Breedlove, the commander of US European Command (EUCOM).
"US European Command directed its component commands to implement additional force protection measures and random security enhancements at facilities across the EUCOM area of responsibility," EUCOM Spokesperson Captain Gregory Hicks said, as quoted by CNN.
The additional security measures will affect 90,000 personnel including 67,000 military.
The decision to step up security measures follows IS threats to attack US troops, according to CNN. The most recent of which came in January when IS posted threatening messages having hacked the social media accounts of the US military's Central Command in Florida.
The January terrorist attacks on the Charlie Hebdo satirical newspaper and the hostage taking in a kosher supermarket in Paris claiming the lives of 16 people, have also contributed to the decision to introduce additional security measures, according to CNN.
