Siege of Dunkirk
1646 CE.
Shown on the map at 51.038°, 2.377°.
The siege of Dunkirk was a siege commenced by France under the command of Louis, le Grand Condé with naval support of the Dutch Republic under the command of admiral Maarten Tromp, who were able to blockade the city to help Condé's siege.
Text from the Wikipedia article Siege of Dunkirk (1646), licensed CC BY-SA 4.0.