The first European to discover New Zealand was Abel Janszoon Tasman, Dutch explorer who arrived to new land on December 13, 1642. In 1769 James Cook, British explorer, made his first visit. After them, in the 1780s many explorers, whalers and sealers travelled to New Zealand. It affectingly influenced the aborigine population. In 1806 first European women arrived. About 2000 Europeans worked for varied positions like slaves or even as personal advisers and much more. They worked in the villages among the indigenous people. Some of them abandoned their own culture and identified themselves as natives. From 1805 to 1840 tribes received many muskets led to the Musket Wars during which the wars among tribes were perpetual. Several tribes have completely disappeared. The others were destroyed as a result of European diseases.