The 1975 Washington Post broke the Chagossian expulsion story as a mass kidnapping.

Evidence

In 1975, two years after the last removals, the Washington Post exposed the story for the first time in the Western press. A reporter found the people living in “abject poverty,” victims of what the paper called an “act of mass kidnapping.” — David Vine, Base Nation_ How U.S. Military Bases…, 184