The date for the move, as well as the location in Poland, has not been announced, but it will take place in 2021.
The Pentagon is also looking into moving U.S. Africa Command out of Stuttgart.
The realignment was triggered by President Trump's call to move some of the roughly 36,000 troops out of the country.
"It's very simple. They're delinquent," Trump said at the White House before leaving on a campaign trip to Texas.
"Not in 40 years have U.S. assurances to NATO been more necessary or more important to our standing in the world."
The move will cost billions of dollars, according to Defense Secretary Mark Esper.
"The conditions that existed at the height of the Cold War are now to be found only in history books."
The letter, from the governors of four German states, was sent to more than a dozen senators and representatives.
Details on the pullout of 9,500 U.S. troops from Germany have yet to be decided.
The ministry provided the figures in reply to a query from opposition Left Party lawmaker Brigitte Freihold.
A UH-1N Huey with 1st Helicopter Squadron was on a training mission when its crew was forced to make an emergency landing.
The former officer received kickbacks in a $5 billion health scheme involving compounded medicine prescriptions.
One of the children suffered injuries including a fractured skull, a broken arm and a fractured spine.
The Air Force's newest combat search-and-rescue helicopter, the HH-60W Jolly Green II, hit another milestone.
He was booted from service five months before retirement for a child molestation conviction 10 years before.