Question: Which event was a surprise military strike by the Imperial Japanese Navy Air Service while Magruder Hill Tuttle was a senior officer in the United States Navy?

Context paragraphs:
Japanese marine paratroopers of World War II: The Imperial Japanese Navy fielded naval paratroopers during World War II.  The troops were officially part of the Special Naval Landing Forces (SNLF or "Rikusentai").  They came from the 1st, 2nd and 3rd Yokosuka SNLFs.  The 2nd Yokosuka took no part in any airborne operations and became an island defensive base unit.  They were under the operational control of the Imperial Japanese Navy Air Service (IJNAS or "Dai-Nippon Teikoku Kaigun Koku Hombu").  "Rikusentai" paratroopers should not be confused with the Imperial Japanese Army paratroopers, known as "Teishin".

Yokosuka B4Y: The Yokosuka B4Y, (Navy Type 96 Carrier Attack Bomber), carrier torpedo bomber was used by the Imperial Japanese Navy Air Service from 1936 to 1943.  The B4Y replaced the Mitsubishi B2M2 and was the last biplane bomber used operationally by the Imperial Japanese Navy.  The Allied reporting name was "Jean".

Eikichi Kato: Captain Eikichi Kato was a senior officer in the Imperial Japanese Navy during World War II.  Kato was the senior officer of the Imperial Japanese Navy forces on the Bonis Peninsula and Buka Island during the latter stages of World War II.

Kōkūtai: A Kōkūtai (航空隊 ) was, during World War II and in the Imperial Japanese Navy, a type of aerial combat unit, similar to the Air Groups in service in the other armies and navies of the time (called "Group" in the British Royal Air Force, "Gruppe" in the German Luftwaffe, "Groupe" in the French Armée de l'Air etc.).  Although belonging to the Imperial Navy the Japanese Kōkūtai could be based at land or on board naval aircraft carriers and were constituted by hundreds of men and aircraft (that latters were distributed in smaller units called Hikōtai, the equivalent of squadrons).  For example, the famous 343 Kōkūtai (a fighter group, divided in three Hikōtai) was based at land while the 652nd Kōkūtai (a bomber group) was carrier-based.  As in general in the Imperial Japanese Navy Air Service, most pilots and aircrew members of a Kōkūtai were non-commissioned officers.

Bombing of Chongqing: The bombing of Chongqing (, Japanese: 重慶爆撃 , from 18 February 1938 to 23 August 1943) was part of a terror bombing operation conducted by the Imperial Japanese Army Air Service and Imperial Japanese Navy Air Service on the Chinese provisional capital of Chongqing, authorized by the Imperial General Headquarters.

Magruder Tuttle: Magruder Hill Tuttle (July 21, 1908 – November 6, 1998) was an American rear admiral.  Born and raised in Lenoir, North Carolina, Tuttle attended Duke University before entering the United States Naval Academy, from which he graduated in 1932.  While at the academy, Tuttle played center on the football team for two years and was team captain in 1931.  For his accomplishments in football at the academy, the "New York Sun" named him as the first-team center on their all-time Navy football team, selected in 1932.  Following graduation, Tuttle was commissioned as an officer in the United States Navy.  He was a senior officer at the Pearl Harbor naval base when it was attacked on December 7, 1941.  During World War II, he served as a pilot and commanded three different squadrons at various times throughout the war.  Tuttle also served in the Korean War and the Vietnam War.  Other assignments included commander of Corry Field, commander of the USS "Philippine Sea", and deputy commander of the Pacific Missile Range.  While stationed in Florida, Tuttle planned and founded the National Naval Aviation Museum.  He died in Pensacola, Florida on November 6, 1998.

Imperial Japanese Navy Air Service: The Imperial Japanese Navy Air Service (大日本帝國海軍航空隊 , Dai-Nippon Teikoku Kaigun Kōkū-tai ) was the air arm of the Imperial Japanese Navy during World War II.  The organization was responsible for the operation of naval aircraft and the conduct of aerial warfare in the Pacific War.

Imperial Japanese Navy Aviation Bureau: The Imperial Japanese Navy Aviation Bureau (海軍航空本部 , Kaigun Kōkū Hombu ) of the Ministry of the Navy of Japan was responsible for the development and training of the Imperial Japanese Navy Air Service.  In 1941 it was headed by Vice-Admiral Katagiri and was organized as follows:

William Forbes-Sempill, 19th Lord Sempill: William Francis Forbes-Sempill, 19th Lord Sempill AFC, AFRAeS, (24 September 1893 – 30 December 1965) was a Scottish peer and record-breaking air pioneer who was later shown to have passed secret information to the Imperial Japanese military before the Second World War.  Educated at Eton, he began his career as a pilot in the Royal Flying Corps and then served in the Royal Naval Air Service and Royal Air Force during the First World War.  In 1921, Sempill led an official military mission to Japan that showcased the latest British aircraft.  In subsequent years he continued to aid the Imperial Japanese Navy in developing its Navy Air Service.

Attack on Pearl Harbor: The attack on Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service against the United States naval base at Pearl Harbor, Hawaii Territory, on the morning of December 7, 1941.  The attack, also known as the Battle of Pearl Harbor, led to the United States' entry into World War II.  The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning.

Supporting paragraphs: Magruder Tuttle Attack on Pearl Harbor
Answer: attack on Pearl Harbor