Dossier №279

2,009 AD

The Nobel Committee awards its Peace Prize to Barack Obama.

This question uses 2009 AD as its sourced chronological anchor.

The award recognized efforts toward international diplomacy and cooperation early in his presidency.

1,955 AD

The results of the Salk polio vaccine trial are publicly announced as successful.

This question uses 1955 AD as its sourced chronological anchor.

The announcement followed a large field trial and enabled mass vaccination with the inactivated vaccine.

1,853 AD

Commodore Matthew Perry's American squadron arrives in Edo Bay carrying a demand for negotiations.

This question uses 1853 AD as its sourced chronological anchor.

The first visit began the expedition that led to a treaty with Japan the following year.

1,940 AD

The Royal Air Force resists Germany's campaign to gain air superiority over Britain.

This question uses 1940 AD as its sourced chronological anchor.

The Battle of Britain ended without the Luftwaffe achieving the conditions needed for a German invasion.

212 AD

Caracalla issues an edict extending Roman citizenship to free inhabitants across the empire.

This question uses 212 AD as its sourced chronological anchor.

The Constitutio Antoniniana greatly widened a legal status that had previously been more restricted.