The force would be part of security guarantees for the country following the end of their war with Russia, which would have the backing of the United States, she said.
Potentially tens of thousands of troops would receive assistance, including intelligence and surveillance assets from Washington, according to the report.
"President Trump reassured us that there will be (an) American presence as part of the backstop," von der Leyen told the FT.
She added the USassurances of support "was very clear and repeatedly affirmed"