Around 160,000 active-duty personnel are stationed outside of the United States, a vast quantity of whom are in Germany.

“Trump is angry that they [Europe] appear to be pushing for war,” a source close to the White House said.

Brian Hughes, a US national security spokesman, said: “While no specific announcement is imminent, the US military is always considering the redeployment of troops around the world to best address current threats to our interests.”