4 August in history.

1701

The Great Peace of Montreal. French colonists and about 40 First Nations signed a peace treaty in Montreal after years of conflict.

Wikipedia: Great Peace of Montreal

Photo: Secrétaire de Callière et autre main (pour les pictogrammes) / Wikimedia Commons (Public domain)

More from 4 August

1. 

   1693

   Tasting the stars

   By tradition, this is the day the monk Dom Pérignon made champagne, though the story is probably a legend.

   Wikipedia: Dom Pérignon (monk)Wikipedia: Champagne

   Photo: Victor Grigas / Wikimedia Commons (CC BY-SA 4.0)

2. 

   1821

   The Saturday Evening Post

   The Saturday Evening Post was first published as a weekly newspaper. It later became famous for Norman Rockwell's covers.

   Wikipedia: The Saturday Evening Post

   Photo: George Fort Gibbs / Wikimedia Commons (Public domain)

3. 

   1830

   Chicago is mapped

   Surveyor James Thompson drew the first map of the small settlement of Chicago. The town was officially founded three years later.

   Wikipedia: Chicago

   Photo: File:Chicago River ferry.jpg : John Picken derivative work: Georgfotoart / Wikimedia Commons (CC BY 2.0)

4. 

   2007

   Phoenix heads for Mars

   NASA launched the Phoenix lander, which went on to find water ice near Mars's north pole.

   Wikipedia: Phoenix (spacecraft)

   Photo: NASA/JPL/Corby Waste / Wikimedia Commons (Public domain)

Moments chosen for discovery, creativity and courage. Each one links to a source where you can read more; photos are credited to their owners.