In the US, territories were established by law for national areas not yet administered by states. They included the Northwest Territory (Midwest), the Louisiana Territory (central US), and various territories which later joined the union as states (the last being Arizona, Alaska, and Hawaii). Puerto Rico and several other islands remain territories of the US. In other governments, territories are also non-states with rights and government different from states. These include Yukon, Nunavut, and the Northwest Territories (Canada), and Australia's Capital Territory, Northern Territory, Jervis Bay Territory, and Tasmania.