The Vespers are an extremely dangerous organization based in Germany.
History
The Vespers were a family, dating back to the early 1500s, just like the Cahills. They evolved into an organization, and they recruit the best in the world and aren't picky apart from that the recruits need to have talent. Damien Vesper, the first Vesper, was Gideon Cahill's best friend until he betrayed him for the Master Serum, forcing Gideon to start the fire which burned down Gideon's laboratory. They are the Cahills worst enemy. The Vespers have been sabotaging the Cahills from the start of Gideon's master serum and framed lots of Cahills for things the Cahills didn't do. The secret followers of Amy and Dan (Rick Riordan, Gordon Korman, Peter Lerangis, Jude Watson, Patrick Carman, Linda Sue Park, Margaret Peterson Haddix) during a meeting were terrified by the mere mention of the Vespers. They are worse than any Cahill. The Vespers have also intruded and had double-cross agents all over the branches, making them more powerful and have more information that the Cahills.
Starting from 2013, the Vespers are at their most powerful.
Main and Active Strongholds
Organizations by The Vesper High Council
Vesper One (Nilem12)
Vesper Two (Alexandra Udinov)
Vesper Three (Commander Orion Albus II)
German Military Support and Counter-Terrorism Department
Vesper Four (Johann Schmidt)
Vesper Five (LucianVesper11)
The Vesper Interrogation Society
Vesper Six (Jai)
Oath
Ich schwöre bei Gott diesen heiligen Eid:
Ich mache unbedingten Gehorsam Vesper One,
Führer des Deutschen Reiches und Volkes,
Oberbefehlshaber der Streitkräfte,
und ich bin immer bereit als tapferer Soldat,
mein Leben für diesen Eid zu geben.