2178 (MMCLXXVIII) was a common year starting on Thursday of the Gregorian calendar (dominical letter D), the 2178th year of the Common Era (CE) and Anno Domini (AD) designations, the 178th year of the 3rd millennium, the 78th year of the 22nd century, and the 9th year of the 2170s decade.
Events[]
- Armat Battlefield Systems buy-out Kramer Metallarbeiten GmBH but the purchase was contested by Three World Empire antitrust courts.
- The Weyland-Yutani released the Type 78 Burst Pistol.
December[]
23[]
- Amanda Ripley-McClaren officially dies.
Appearances[]
- Aliens (mentioned only)
- Aliens: Fireteam Elite (mentioned only)
- Alien: Colony War (mentioned only)