Conversation so far:
What was Allen Dulles involvement with World War II?
Dulles was recruited into the Office of Strategic Services by William J. Donovan in October 1941, after the outbreak of the Second World War in Europe.
What does Switzerland have to do with Allen Dulles in World War II?
On Nov. 12, 1942 Dulles moved to Bern, Switzerland, where he lived at Herrengasse 23 for the duration of World War II.
Was Allen Dulles associated with anybody or plotted with anybody during his time with the OSS in Switzerland?
As Swiss Director of the OSS, Dulles worked on intelligence regarding German plans and activities, and established wide contacts with German émigrés, resistance figures, and anti-Nazi intelligence officers.

Question: What kind of intelligence gathering activities?
Self-contained rewrite: What kind of intelligence gathering activities did Allen Dulles pursue in Switzerland during World War II?