During World War II, the Japanese attack on Pearl Harbor did, in a sense, constitute an invasion, and the governor of Hawaii did suspend habeas corpus and declare martial law there. But it was plain that the United States itself faced no actual invasion of the sort envisioned by the founders, and FDR did not suspend the privilege—though he did, of course, order the detention of Japanese and Japanese-Americans. Also, during the post-World War II Red Scare, the McCarran Act called for the suspension of habeas corpus in case of an invasion, insurrection, or war, but those provisions were never implemented and in 1971 were repealed.