First off, apologies for the delay. Things got busy with irl things and other scanlation stuff.
Second, I was agonizing for a couple more days about how I would format the mnemonics in a way that'd be easy to understand so this took even longer.

I don't even know if it is easy to understand haha. At first, I just added the romanized Japanese and added a bunch of TL notes, but that became too cluttered, so I settled with this + adding notes in the forum to teach interested readers.
794 nakuyo uguisu heian-kyou
Heian-kyou was the imperial capital of Japan established by Emperor Kanmu in what is now Kyoto. By around 1220, the majority of people used the name Kyoto to refer to the city.
1582 ichigo pantsu de honnou meramera
The Honnou-ji Incident was a sudden military coup and attempted assassination of Oda Nobunaga by his trusted general, Akechi Mitsuhide, at the Honnō-ji temple in Kyoto. In more recent times, this was also an event you play through in Assassin's Creed Shadows.
1919 iku iku hotel versaiyu
On May 7, 1919, the German delegation is marched into the great hall and were handed the draft of the treaty at Trianon Palace Hotel. A couple disagreements and resignations from the German government later, the treaty was ultimately accepted then signed on June 28, 1919 at the Palace of Versailles.
57 konna dekai no otoko no kin'in
In 57 AD, Eastern Han Emperor Guangwu bestowed a solid gold seal upon an envoy from the Japanese state of Na, marking the first written record of Japan in history. Na was located in and around the modern-day city of Fukuoka from the 1st to early 3rd centuries CE. The 漢 (Kan) in 漢委奴国王印 (kan no wa no Na no koku ou in) is also pronounced as otoko or man, specifically a man's man, hence the pun about a man, man. The text on the seal translates to: King of Na from [the land of] Wa (Japan), [vassal of] Han/Kan
1159 ii gokkun heiji no ran
The Heiji Rebellion was a short civil war in Kyoto in which Minamoto no Yoshitomo and Fujiwara no Nobuyori seized Emperor Go-Shirakawa while Taira no Kiyomori was away. Kiyomori returned and crushed them, leaving the Taira in power.
You might see it dated to either 1159 and/or 1160. This is likely because "Heiji" is the nengou or era name, which spans 1159-1160, but the fighting began in the 12th month of Heiji 1, which falls in January 1160 on the Western calendar. So 1159 is the Japanese year and 1160 is the converted date.
1851 ippatsu koite taihei tengoku
January 11, 1851 was when Hong Xiuquan declared himself "Heavenly King" of a new dynasty, the Taiping Heavenly Kingdom or the "Heavenly Kingdom of Great Peace."
810 pai wo kusuguri kusuko no hen
The Kusuko Incident was a failed power grab by retired Emperor Heizei. He and his lover, Fujiwara no Kusuko, along with her brother Nakanari, tried to move the capital back to Nara and restore Heizei's authority over his brother, Emperor Saga. The incident was long blamed mainly on Kusuko, hence the name, but since 2003 some Japanese textbooks have called it the "Retired Emperor Heizei Incident."
1840 iyayoo ahe ahe ahen sensou
In 1839, the First Opium War broke out between Qing China and Great Britain and this alerted Japan to the possibility of invasion by Western European countries. Around this time Fusetsu gaki (News Reports) were standardized and simplified and in addition to these, Betsudan fusetsu gaki (Separate Reports) providing detailed information on the Opium War began to be submitted from 1840. These detailed reports on foreign affairs were continued even after the end of the Opium War.
45 shikoru
just straight up jorkin it. I don't have the erogoro book to see what event it references (probably 1945), but idk ¯\
(ツ)/¯
Oh, and the larger, bolded text in the speech bubbles for the mnemonics are what the original Japanese roughly translate to.
That's all. Let me know of any errors and points improvement here in the forums, as always. Thank you!
references:
https://en.wikipedia.org/wiki/Heian-kyō
https://www.ctevans.net/Versailles/Chronology/Chronology.html
https://wearekollectors.com/en/wald...-the-royal-citys-most-legendary-luxury-hotel/
https://www.hilton.com/en/hotels/cd...lles-trianon-palace/hotel-info/hotel-history/
https://en.wikipedia.org/wiki/Treaty_of_Versailles
https://en.wikipedia.org/wiki/King_of_Na_gold_seal
https://jmapps.ne.jp/kokugakuin/files/6807/pdf_files/68996.pdf
https://en.wikipedia.org/wiki/Han_dynasty
https://samurai-archives.com/wiki/Na
https://en.wikipedia.org/wiki/Heiji_rebellion
https://samurai-archives.com/wiki/Heiji_Disturbance
https://en.wikipedia.org/wiki/Emperor_Nijō
https://en.wikipedia.org/wiki/Taiping_Heavenly_Kingdom
https://en.wikipedia.org/wiki/Kusuko_Incident
https://jisho.org/word/シコる
https://publibjp.com/20170428-2