 Shortly thereafter the Donia War (1458–1463) began, followed by an explosion of other disputes; the towns Sneek now played a large role, some actively, some passively (Dokkum 1470, the Beer Uproar of Leeuwarden in 1487).Attempts by the Emperor to settle the dispute proved fruitless.Holland could not supply the Vetkopers the help they needed, from which the Groningers profited until they themselves were defeated while laying siege to Franeker and had to abandon Westergo (1496).