Hints for ERA #20

Difficulty: Hard

Spoiler-safe hints for the ERA puzzle of October 10, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

The oldest event is: Battle of Khaybar.

Hint 2

The most recent event is: Mars Reconnaissance Orbiter.

Hint 3

Treaty of Versailles happened in 1919.

The answer

Contains the answer. Open only if you are stuck.

  1. 628Battle of Khaybar · Battle
  2. 1086Battle of Sagrajas · Battle
  3. 1919Treaty of Versailles · Treaty
  4. 1930Bank for International Settlements · Founded
  5. 1947The Plague · Book
  6. 2005Mars Reconnaissance Orbiter · Spaceflight

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ERA

Six events from history — battles, books, inventions, treaties, spaceflights — shuffled. Put them oldest to newest in four tries. The same puzzle for everyone, in every language.