Warzone's Season 4 update includes a Jailbreak special event. Here's how Jailbreak works.
Warzone Jailbreak - how does it work?
In Call of Duty: Warzone, if you're anything like us, you'll get killed a whole lot, especially at first. Thankfully though, there's ways to get out of this. The first time you die, for example, you get thrown in the Gulag, which gives you a 1v1 chance to get out and back into the action.
If you die in the Gulag, you'll need to be bought back by your teammates. This costs 4500 at Buy Stations, or free during a Fire Sale.
There's one other way to come back, though it's not reliable. Jailbreaks happen at random during a match, and will respawn everyone not currently in-game. The only stipulation is that the players must have surviving teammates. You'll still spawn with very little gear though, so be very careful.