CHATBOT: Creating a year-by-year timeline for such a detailed crossover involving multiple series is a large task which may be difficult to achieve entirely within the constraints of one response. However, I'll try to outline a realistic and sensible alternate history timeline that could serve as a framework for a fanfic incorporating Boku no Hero Academia, Hundred, IS: Infinite Stratos, Heavy Object, Muv-Luv, Black Bullet, and Magika no Kenshi to Shokan Vashireusu. **1990:** The world sees the first recognized cases of Quirks emerging in individuals, initially explained by the global scientific community as a new stage in human evolution. The unexpected phenomenon leads to widespread excitement and chaos, pushing other concerns and secret developments into the background. **1991:** Quirks are becoming more common, and the world begins to adapt. In secret, high-level negotiations allow the Dai Nippon Teikoku, a powerful Japan that has quietly expanded and maintained some sphere of influence beyond its public territories, to reclaim lost territories. Strategic partnerships with emerging powers lay the groundwork for further restorations. **1992:** As Quirks grab headlines, several gifted females reveal extraordinary powers, entering the public eye as Heroes. These women stealthily disguise their contracts with Divas as Quirks, avoiding public scrutiny of mystical phenomena. **1993:** Engineers from the Dai Nippon Teikoku clandestinely develop specialized suits, later known as IS units, overtly for space exploration, while secretly aiming to provide Diva contractors with the means to materialize a Decollete Oblique/Decorteo Brigieux. **1994:** Governments around the world begin organizing Quirk users into specialized roles, ranging from civil service to law enforcement, and standardized Quirk education and training systems are put in place. The TSFs, secretly developed by Nihon-jin military scientists, remain hidden, with tests conducted under the utmost secrecy. **1995:** Beiyang Zhengfu is restored and begins to guide the Da Mingguo back to power. Meanwhile, the IS units' true combat potential is realized, and they are mass-produced for an elite all-female force. **1996:** In the shadows, Century Armament technology is developed as an improvement over the IS units, designed to fight hitherto concealed threats such as the extraterrestrial Savages and the multidimensional Seirei quickly and stealthily. **1997:** The Aisin-Gioro imperial house and the Imperial House o...

CHATBOT: Based on the intricate details you've provided for this crossover fanfic universe, let's construct a year-by-year alternate history timeline that tries to maintain a level of realism and plausibility according to the rules set by the existing lore of each respective universe. This timeline will also take into account geopolitical shifts mentioned, such as the resurgence of certain empires. Please note, due to the complexities and sheer number of franchises involved, the timeline below may not cover every aspect in depth, but it will create a foundation from which the story could logically progress. Assume that all events and developments from the various series occur naturally within this world unless contradicted by the timeline. **1990s:** - **Early 1990s:** The Soviet Union collapses, but instead of splintering, a series of monarchies emerge from the former republics, influenced by a resurgent Japan and its alliances. These monarchs harbor ancient bloodlines and secrets concerning Divas and spiritual entities. - **Mid-1990s:** The phenomenon of Quirks begins to manifest globally, rapidly shifting public attention from political to superhuman concerns. Behind the scenes, this conceals both the re-emergence of Divas and the beginnings of strategic supernatural militarization. - **Late 1990s:** Diva contractors capitalize on Quirk emergence, hiding their own powers in plain sight. These individuals often become influential in government and military circles. **2000s:** - **Early 2000s:** Japan begins the development of the IS Unit, secretly building upon Diva-contracting technologies. They hope to create knights bonded with Divas, while publicly marketing it as a push for female empowerment and gender-balanced military forces. - **Mid-2000s:** The IS units are initially deployed for space exploration but are soon recognized for their combat potential. A prototype Century Armament enhances an individual's physical capabilities and becomes a coveted military asset. - **Late 2000s:** The Japanese government, aware of the threat posed by Savages, begins developing countermeasures. TSFs become public knowledge after a demonstration of their devastating potential. **2010s:** - **Early 2010s:** The existence of Gastrea is acknowledged at the highest levels of global security. Black ops and special forces groups begin covert operations to combat the parasite and experiment on the Cursed Children for militaristic purposes. - **Mid-2010s:** As global threats mount, ...