WASHINGTON (AP) — The United States is footing more of the bill for overseas bases in Germany, Japan and South Korea even as the military reduces the number of American troops in Europe and strategically repositions forces in Asia, a congressional report says.

The exhaustive, yearlong investigation by the Senate Armed Services Committee focused on costs and burden-sharing as the United States spends more than $10 billion a year to back up the U.S. military presence overseas, with 70 percent of the amount expended in the three nations. The figure does not include military personnel costs.