Part 3/10:
As tensions escalated between the Federation and the Klingon Empire, Starfleet made the decision to keep the Constitution class starships off the front lines, reserving them as a last line of defense. This strategic maneuver put considerable strain on the crews aboard these ships, particularly as they faced some harrowing encounters. Notable losses included the USS Constellation, destroyed by a Doomsday Machine in 2267, and other ships that faced dire fates due to various catastrophic events.