Strategic Scientific Reserve

The Strategic Scientific Reserve (S.S.R.) was the top secret Allied war agency during World War II. It was later absorbed by S.H.I.E.L.D. when the United States government with agreement with Howard Stark, decided they needed a new government agency to deal with post-war threats.

The current S.H.I.E.L.D. base is a refurbished S.S.R. facility, with its various vaults holding numerous ancient archives and buried treasures.

History
The S.S.R was an United Kingdom and United States secret allied agency to deal with the threat of Nazi Germany, including their HYDRA division led by Johann Schmidt. After the fall of Nazi Germany and the death of Schmidt, the S.S.R. main purpose was to cover up HYDRA's dangerous scientific discoveries and arrest and imprison HYDRA members such the leading scientist Zola.

The SSR later moved their headquarters to New York, and became more heavily influenced by the United States government than the United Kingdom.

After the war the S.S.R. was responsible for investigating Stark Industries which was owned by Howard Stark as the weapons designed by the company were being replicated and used against United States interests. This investigation found Howard and his company to be innocent of any crimes but discovered a Russian organisation called the "The Leviathan" that had both an interest in Stark and his weapons.