The Yamataian Calendar year YE 23 began on January 1, 2003 ¹⁾ and only lasted about a month of OOC time.

• Ralfaris conquered by Star Army of Yamatai.
• fourth_elysian_war begins.
• Damasica (Neo Kohana) destroyed.
• Qel'noran Shipyards founded.
• Kessaku Anri invents MEGAMI Quantum Computer.
• Empress Ketsurui Yuumi killed in Elysian attack; Star Army of Yamatai assumes control of the government.
• Terraforming begins on Nataria, Anisa, and Tatiana

• YSS Hellkitten
• GSS Philosophy

• Subjugator-Class Landing Ship
• Wakizashi Escort

• NH-17 Nekovalkyrja
• MEGAMI Quantum Computer.