CTF365 is a revolution in the world of capture the flag, simulated attacks and Information security as a whole. A team can consist of between 5 to 10 users who have to protect their fortress and its services while also attacking other team’s fortresses. The environment is designed to consist of “fortresses,” which are VMs launched by each team and then that team has to run an array of services and lock them down to prevent them from being hacked. The main aspect to CTF 365 is the team aspect of the fortress attack and defense environment. This primary function sets them apart from the isolated and single-event CTFs at different conferences.
Source: https://thehackernews.com/2013/11/capture-flag-next-generation-it.html