All completed dossiers
Revealed daily file

Dossier №233

Friday, August 21, 2026

  1. 01

    1,917 AD

    Bolshevik forces seize key sites in Petrograd and overthrow Russia’s provisional government.

    This question uses 1917 AD as its sourced chronological anchor.

    The October Revolution brought Lenin’s party to power and led toward the creation of the Soviet Union.

  2. 02

    1,347 AD

    The Black Death reaches Mediterranean ports and begins spreading rapidly through Europe.

    Trade routes carried both commerce and catastrophe.

    Ships arriving in Sicily helped introduce the plague into European trading networks. The pandemic killed an enormous share of the population and transformed labor, religion, art, settlement, and political relations for generations.

  3. 03

    1,928 AD

    Alexander Fleming notices that a mold has killed bacteria in a laboratory dish.

    An accidental observation needed years of development before becoming medicine.

    Fleming identified the antibacterial effect of Penicillium mold, but producing a useful drug required later work by teams including Howard Florey and Ernst Chain. Mass production during the Second World War transformed treatment of bacterial infections.

  4. 04

    127 AD

    Kanishka begins the reign conventionally associated with the Kushan Empire’s high point.

    This question uses 127 AD as its sourced chronological anchor.

    Kushan rule connected South and Central Asia, encouraging commerce and important developments in Buddhist art and patronage.

  5. 05

    500 BC

    During the fifth century BCE, Darius I’s administration reorganizes an imperial road linking Sardis with Susa.

    This question uses 500 BC as its sourced chronological anchor.

    Royal couriers, standardized routes, and administrative stations helped govern a multilingual empire across enormous distances.