Baekje
Baekje or Paekche (, pɛk̚.t͈ɕe) was a Korean kingdom located in southwestern Korea from 18 BC to 660 AD. It was one of the Three Kingdoms of Korea, together with Goguryeo and Silla. While the three kingdoms were in separate existence, Baekje had the highest population of approximately 3,800,000 people (760,000 households), which was similar to that of Goguryeo (3,500,000 people) and much larger than that of Silla (850,000 people). Baekje was founded by Onjo, the third son of Goguryeo's founder Jumong and Soseono, at Wiryeseong (present-day southern Seoul). Baekje, like Goguryeo, claimed to succeed Buyeo, a state established in present-day Manchuria around the time of Gojoseon's fall. Baekje alternately battled and allied with Goguryeo and Silla as the three kingdoms expanded control over the peninsula. At its peak in the 4th century, Baekje controlled most of the western Korean peninsula, as far north as Pyongyang, and may have even held territories in China, such as in Liaoxi, though this view is controversial. It became a significant regional sea power, with political and trade relations with China and Japan. Baekje was a great maritime power; its nautical skill, which made it the Phoenicia of East Asia, was instrumental in the dissemination of Buddhism throughout East Asia and continental culture to Japan. In 660, it was defeated by the Tang dynasty and Silla, and was ultimately submitted to Unified Silla. The most common name used by most historians is Baekje (백제), meaning "hundred counties", but was originally founded by Onjo as 十濟, which figuratively means "tens of counties". Only during the reign of Geunchogo (肖古王) was it renamed as Baekje. It is also attested as 居陀羅 Kudara, meaning "great place", which could have been a possible endonym that was later on borrowed into Old Japanese. Baekje is mainly composed of the native Han (Hanja: 韓人) and the Koreanic Yemaek (Hanja: 濊貊族) from Goguryeo and Buyeo. Those from the Lelang Commandery (Korean: Nakrang, Hanja: 樂浪) came in through trade and conquest, and a small number of Jin (Hanja: 辰人) were also admitted into the polities of Baekje.