Special Ops is Infinity Ward's traditional 3rd mode. Where Treyarch has the more popular Zombies, IW have their Spec Ops. And while it has been a substantially less popular mode than Zombies, it still provided some great missions over the years.
Infinity Ward nailed this mode when they first introduced it back in 2009, but when they tried to remake it for Modern Warfare 2019, it was almost as terrible as the maps. Let's pretend MW2019 doesn't exist.
Here are the best Spec Ops missions in Call of Duty history. Spoiler alert, they're mostly from the best CoD of all time: MW2.