The following is a timeline of events in the Assault Horizon universe.
- Taiga Store, the predecessor of Taiga Heavy Industries, is founded in the early years of Japanese Westernization.
- The Allied Forces lift the ban on Japanese aircraft production. Taiga Heavy Industries is born.
- Unknown date, early decade: A CFA-44 Nosferatu is spotted by satellite imaging near the Black Sea in Romania.
- 1983: Mass production of the MiG-29A Fulcrum begins in the Soviet Union.
- 1985: Start of mass production of the Su-27 Flanker.
- 1991: The Soviet Union collapses, being later replaced by the Russian Federation.
- Unknown: In response to the reveal of the F-117, Russia deploys the CFA-44 in conflicts across the globe.
- Unknown: A CFA-44, serial number 44-025388, suffers mechanical problems and crashes in Africa. The wreckage is recovered and becomes the first Fandance in Western hands.
- A growing threat of terrorism looms in the Middle East. The Blatnoi syndicate and the arms smuggling ring Aist gain prominence in the global underworld.
- September 11: The September 11 attacks take place. The world is put on a heightened level of alert to any suspicious activity.
- May 23: The 2002 Japan unauthorized incursion incident takes place. Two unidentified aircraft fly over Japanese airspace and disappear. A re-analysis of Japan's defense is performed, and a new aircraft is to be developed to help defend the country from any similar events in the future.
- August: Taiga Heavy Industries begins development of the Shinden II, named after the Kyūshū J7W1 Shinden.
- October: Taiga commissions Rolls-Royce Holdings and EuroJet Turbo GmbH to develop the Shinden II's engines.
- August: Taiga formally announces the Shinden II.
- October: Taiga finalizes the Shinden II's body design.
- May: Taiga conducts tests on the Shinden II's body with EuroJet's engines.
- November: Japan's Ministry of Defense formally orders the development of the Shinden II and strikes a deal with Taiga to perform further tests. The F-22A Raptor is excluded from the program.
- February: The Ministry of Defense reviews the Shinden II and has another round of talks with Taiga over the aircraft's development.
- March: Taiga orders six STOVL engines from Rolls-Royce.
- May: Rolls-Royce delivers the STOVL engines.
- May: Production commences on the first functional prototype of the Shinden II.
- June: Production commences on the Shinden II's air-to-air missiles.
- September: The ASF-X-0, the first Shinden II prototype, is built for airframe strength testing.
- Taiga unveils plans to develop the F-3 ENG, an English export version of the Shinden II.
- August: The British government orders 60 F-3 ENGs.
- August: Taiga begins testing the ASF-X-01 prototype, the successor to the ASF-X-0.
- February: The ASF-X-01 is sent to Japan's Ministry of Defense. Japan's Technology Research and Development Institute forms an internal testing group, the Provisional Assessment Team, composed of F-15J pilots from the Japan Air Self-Defense Force.
- March: The Provisional Assessment Team begins testing the ASF-X-01.
- April: Taiga's facility in Yokosuka conducts a Shinden II test flight, the first of over 1,200 to take place over the next four years.
- The ASF-X-01 suffers light issues related to electricity and cracking. These issues are not deemed dangerous to the aircraft's flight; tests continue with no delay.
- September: Production commences on the ASF-X-02 prototype. This airframe is the first Shinden II to feature the STOVL engines.
- The Blatnoi group plots to bring down the Russian government. In preparation, militias in East Africa are provided weaponry and support to divert attention from their plans.
- The SRN faction stages attacks against governments in East Africa. The governments request support to the United Nations. In response, NATO forms Task Force 108 to combat the rebels.
- December 21
- The Nomad Squadron and Shooter Squadron attack an SRN settlement. The mission results in a Trinity weapon exploding.
- SRN aircraft attack the main NATO base in Hamada. The Warwolf Squadron, aided by the French Lion team and the Russian Big Bear unit, drive off the attackers.
- Blatnoi agent Sergei Illich is shot down by the rebel and recovered by Russian mercenaries, and is brought to a rebel-held town.
- December 22
- Sergei Illich is found by TF108 and rescued from the SRN.
- December 23
- Task Force 108 attacks rebels in Mogadiyu. Backed by Spooky 01, Delta Force units destroy an underground SRN weapons cache.
- The city of Carruth is besieged by rebel forces. Ivan Stagleishov and Big Bear betray NATO. Andrei Markov reveals himself and nearly kills Bishop. Stagleishov defects.
- Carruth is destroyed by a Trinity attack. Blatnoi reveals itself to the world.
- December 25
- Task Force 108 is mobilized to Dubai.
- December 26
- December 31
- Taiga commences phase two of testing the Shinden II.
- January 3
- January 6
- January 10
- January 15
- January 18
- Andrei Markov and Sergei Illich lead a remnant of the New Russian Federation in an attack in Miami. The United States Air Force destroys most of the invading force. José Gutierrez is shot down by Markov, who later escapes after fighting Bishop.
- Markov flees north and regroups with an NRF force led by Illich. Warwolf Squadron intercepts them off the coast of Hollywood, Florida. Illich is killed by Bishop, and Akula escapes.
- Washington, D.C. is attacked by the New Russian Federation. The attacking force is destroyed.
- Markov enters Washington to destroy the White House with Trinity. He engages Bishop in one final confrontation and dies. The war comes to an end.
- June: The ASF-X-02 is sent to Japan's Ministry of Defense.
- July: The ASF-X-03 is completed and sent to the Ministry of Defense.
- August: The ASF-X-04 is completed and sent to the Ministry of Defense.
- The ASF-X-01, -02, -03, and -04 all complete a final test flight. The Shinden II is greenlit for official service.
- October: Preliminary development commences on the F-3FSD (Full Scale Development) model of the Shinden II. Development also commences on the CTOL Shinden II model.
- December: Development commences on the STOVL Shinden II model.
- May: The first F-3FSD model is completed.
- July: Testing commences on the first F-3FSD model.
- Six STOVL and six CTOL models of the F-3FSD are produced and delivered to detachments in Hokkaido and Okinawa for testing, in the hopes of detecting and solving production issues as rapidly as possible.
- September 15: The Haneda Incident takes place. Believed to be performed by remnant members of the New Russian Federation, United States Navy assets were bombed near the Haneda Airport in Tokyo.
- September 15–17: The Japanese military alters its aviation protocols and immediately orders the four ASF-X Shinden II test models to carry live weapons in the event of another attack.
- September 18: A squadron of New Russian Federation Su-37 Terminators, supported by jamming aircraft, attempt a second terrorist attack in Tokyo. The ASF-X Shinden II squadron shoots down the initial attack force, prompting the remaining pilots to retreat. The Japanese government subsequently authorizes the entry of Shinden II aircraft into active service.
- October: Following the successful development of some F-3A Shinden IIs, the F-3B begins development.
- January: One F-3FSD Shinden II is delivered to Japan's Ministry of Defense.
- March: One STOVL Shinden II is delivered to the Ministry of Defense.
- April: The JASDF holds a ceremony to commemorate the delivery of the first F-3A Shinden IIs to a temporary testing unit.
- May: The first F-3B Shinden IIs are delivered to the Japan Maritime Self-Defense Force at Naval Air Facility Atsugi. 12 F-3FSD models are planned to be converted to mass-production standard.
- April: The Japanese military begins trials on the F-3B Shinden IIs.
- The United Kingdom purchases its first F-3B Shinden IIs. In British service, the aircraft is named the "F-3C-RN Magnificent Lightning".
- September: The first batch of Magnificent Lightning models are delivered by a Japan Maritime Self-Defense Force ship, which departed from Yokosuka, traveled through Singapore and South Africa, and arrived in Portsmouth.
- October 14: The West Africa civil war begins. The delivered Magnificent Lightnings, in a squadron led by Captain Clemens Knightley, are used in service against the Nigerian side of the war.
- At the close of the West Africa civil war, one of the Magnificent Lightnings engaged and destroyed a CFA-44 Nosferatu defending the Nigerians.