# Truce of Deulino (1618)

URL: https://poland-history.com/timeline/1618-truce-of-deulino
Location: Deulino

The Commonwealth reached its greatest territorial extent, keeping Smolensk and Chernihiv. Within the broader Polish–Lithuanian Commonwealth period: The Commonwealth of Both Nations elected its kings and prized noble liberty and religious tolerance. It won famous victories but was weakened by wars with Sweden, Russia, the Ottomans and the Cossacks, and by political paralysis. At this point in the timeline (1618), the governing authority was Sigismund III Vasa (King of Poland). Also King of Sweden (1592–1599); moved the royal residence to Warsaw and pursued war with Sweden and Muscovy. Truce of Deulino mattered because its terms redrew borders or alliances and constrained Poland's options for years to come. The event is placed here so readers can follow it alongside changes in government, warfare, society, religion and culture across Polish history.

## Why it matters
Truce of Deulino mattered because its terms redrew borders or alliances and constrained Poland's options for years to come.

Ruler at the time: [Sigismund III Vasa](https://poland-history.com/rulers/sigismund-iii-vasa)

## Sources
- [Wikipedia — Truce of Deulino](https://en.wikipedia.org/wiki/Truce_of_Deulino)
- [Encyclopaedia Britannica topic lookup — Truce of Deulino](https://www.britannica.com/search?query=Truce+of+Deulino)
- [Wikipedia — Polish–Lithuanian Commonwealth (period overview)](https://en.wikipedia.org/wiki/Polish%E2%80%93Lithuanian_Commonwealth)