Task Force: The Third Era (Please Read Description)

Note: This is my first story that I've made public, my friend thought it would be a good idea to release one of my stories so I could see if people like it. Also, that's why you won't get some references, I've been writing a whole series and I decided to start right in #3 for no apparent reason. Now, for the description to the story:
In an alternate dimension, an elite task force made up of various branches of various militaries have been going deep behind enemy lines to execute missions capable of altering entire wars. In 2013, the third generation of the legendary Grove family, 18-year old Hal ("Echo",) gets boosted to the third most important person in this task force under an unauthorized protocol and fear of assassination of his father, colonel Hunter ("Viper") and/or grandfather general Alex ("Sunset.")