28 years ago - 19-year-old Amanda Waller graduates early from the Universite Nortre Dame Des Ombres to have her first child & becomes a DEO operative. 19-year-old Christopher Chance is caught running a con on the federal department, and is recruited by the DEO
23 years ago - 21-year-old Cole Cash, 29-year-old King Farada, 25-year-old Patricia Trayce & 24-year-old Christopher Chance become elite spec-ops operatives for the DEO.
21 years ago - 22-year-old Richard Dragon & 26-year-old Ben Turner are recruited by 31-year-old King Faraday & become covert assets for the DEO.
20 years ago - 27-year-old Amanda Waller leaves the DEO to becomes an operative in Sandra Knight's newly formed Checkmate. 24-year-old Cole Cash leaves the DEO and becomes a mercenary.
19 years ago - 21-year-old Bones turns on Doctor Love & his experiments and hands himself over to the DEO where he soon becomes an asset. 29-year-old Patricia Trayce retires from the DEO.
18 years ago - Frankenstein is recovered by the DEO, who commission him to battle his old employers, S.H.A.D.E.
14 years ago - 26-year-old Bones leaves the DEO to become the field leader of the new Freedom Fighters.
13 years ago - 34-year-old Amanda Waller consolidates much of the DEO's tactical responsibility into Checkmate, leaving the DEO primarily responsible for extranormal affairs.
12 years ago - unable to find or deactivate the Brother Eye Satelite, 29-year-old Hal Jordan leaves and so he hands 31-year-old Buddy Blank over to the DEO for observation. 35-year-old Amanda Waller takes him into Checkmate so he can join the Freedom Fighters.
7 years ago - 18-year-old Caitlin Fairchild's metagene activates. She fights them off S.H.A.D.E.& helps bring them down. She transfers into the DEO and joins the newly formed Freedom Fighters as their science adviser.
5 years ago - 35-year-old Bones is given control of the DEO. He makes 47-year-old King Faraday the new tactical head and moves the Freedom Fighters under their control.
2 years ago - 30-year-old Diana begins working with the DEO. 34-year-old Thomas Tresser becomes her handler.