All completed dossiers
Revealed daily file

Dossier №264

Monday, September 21, 2026

  1. 01

    1,994 AD

    Nelson Mandela becomes South Africa’s first president elected by a multiracial electorate.

    This question uses 1994 AD as its sourced chronological anchor.

    The election marked the democratic end of apartheid and brought the African National Congress to national power.

  2. 02

    1,876 AD

    Alexander Graham Bell receives a United States patent for the telephone.

    This question uses 1876 AD as its sourced chronological anchor.

    Early demonstrations showed that recognizable speech could be transmitted electrically over wire.

  3. 03

    732 AD

    A Frankish army led by Charles Martel defeats an Umayyad force near Tours and Poitiers.

    This question uses 732 AD as its sourced chronological anchor.

    The battle checked a major raid north of the Pyrenees and later gained an outsized place in European historical memory.

  4. 04

    753 BC

    Roman tradition assigns this year to the founding of the city by Romulus.

    This question uses 753 BC as its sourced chronological anchor.

    The date belongs to later legend rather than contemporary evidence, but Romans used it as a powerful civic origin story.

    The origins of Rome

    Musei Capitolini · verified 2026-08-06

    The Capitoline Museums identify 753 BCE as Rome’s conventional foundation date while also noting archaeological traces that predate it.

  5. 05

    1,469 AD

    Sonni Ali captures Timbuktu and brings the city under the expanding Songhai Empire.

    This question uses 1469 AD as its sourced chronological anchor.

    His conquests transformed Songhai into a regional empire, although his treatment of Timbuktu’s scholarly community was repressive.