G.U.A.R.D. was an organization that maintained contact with S.H.I.E.L.D. after World War II.
History[]
One of the analysts at the Strategic Scientific Reserve New York Office ordered Agent Carter to make an analysis of a large number of transmissions from G.U.A.R.D. to S.H.I.E.L.D. for the following day, which would force Carter to spend the night working at the office. However, Carter already anticipated such an order, and handed the completed analysis to her co-worker.[1]