Even though it's a science fiction work, when I look up the Universal Century timeline, I'm amazed at how intricate its setting is.
The work known as "Char's Counterattack" isn't that long when compiled chronologically,
but if we just look at the period it runs as an anime...
March 4th
The 5th Luna, whose orbit has been altered by Neo Zeon, crashes into Lhasa.

U.C.0093.02.27. Neo Zeon virtually declares war during an interview program | ふっださん's Gunpla works