The Trump administration’s Justice Department informed the U.S. Supreme Court on Tuesday that it will not challenge a landmark lower court ruling that “blue water” Navy veterans who served during the Vietnam War are covered by the federal Agent Orange Act.

The decision by U.S. Solicitor General Noel Francisco ended months of uncertainty for tens of thousands of former service members or their survivors who may now be eligible for benefits stemming from exposure to Agent Orange. The benefits have been estimated to cost the Department of Veterans Affairs more than $1 billion over 10 years.