The flag of Hawaii (Hawaiian: Ka Hae Hawaiʻi), in addition to the current state design, previously had been used by the kingdom, protectorate, republic, and territory of Hawaii. It is the only U.S. state flag to include a foreign country's national flag. The inclusion of the Union Jack of the United Kingdom is a mark of the Royal Navy's historical relations with the Hawaiian Kingdom, particularly with King Kamehameha I. The flag continued to be used after the 1893 overthrow of the Hawaiian Kingdom. (Source: Wikipedia.org, CC BY-SA)