Valtellina War
1620 CE.
Shown on the map at 46.167°, 9.867°.
The Valtellina War (1620–1626) was an episode of the Thirty Years' War arising out of competition to control the Valtelline, an Alpine valley forming a key part of the Spanish Road.
Text from the Wikipedia article Valtellina War, licensed CC BY-SA 4.0.