https://www.history.com/this-day-in-history/japanese-bomb-u-s-mainland?cmpid=email-hist-tdih-2022-0 [login to see] 2&om_rid=&~campaign=hist-tdih-2022-0909
On September 9, 1942, a Japanese floatplane drops incendiary bombs on an Oregon state forest—the first air attack on the U.S. mainland in the war. Launching from the Japanese sub I-25, Nobuo Fujita piloted his light aircraft over the state of Oregon and firebombed Mount Emily, alighting a state forest. The president immediately called for a news blackout for the sake of morale. No long-term damage was done, and Fujita eventually went home to train navy pilots for the rest of the war.