Hawaii is a set of islands that were discovered in 1778 by Captain James Cook. The native Hawaiians were Polynesians and worshiped tiki gods. In the decades after Cook's visit, the islands were united under one chief after the great war chief's wars of unity.
Hawaii became united under King Kamehameha who forced all independent kingdoms in the Hawaiian Islands to join a Hawaiian Kingdom under his rule. He did not do this via diplomacy or by elections. He did it by conquest in the warrior traditions of the ancient Hawaiians, but with the help of European weapons.