Answer:
The Doolittle Raid was the first US air raid during World War II in April 1942 on Japanese territory.
The first and most important consequence of the Doolittle Raid was clearly psychological, since the attack showed that fighting the Japanese within their own territory was possible.
The direct results of the bombing in Japanese territory totaled 50 dead, 250 wounded and 90 buildings destroyed, in addition to warehouses, factories and gas tanks also destroyed. The damage inflicted on the enemy by the Americans was classified as a minimum. US losses were 16 B-25 aircraft, and 11 crew lost.
Doolittle returned to the US where he was promoted to Brigadier General and was awarded the Congressional Medal of Honor, the Silver Star and the Distinguished Flying Cross.