The degree of the organization of Jin as a formal political state is unclear. It seems likely that it was a federation of small states much like the subsequent
Samhan. For the state to be able to contend with its contemporary
Wiman Chosŏn and send embassies to the court of the
Western Han dynasty, there was probably some level of stable central authority. Korean historian Ki-baek Lee (1984, p. 24) also suggests that the kingdom's attempt to open direct contacts "suggests a strong desire on the part of Chin [Jin] to enjoy the benefits of Chinese metal culture." However, for the most part Wiman Chosŏn prevented direct contact between Jin and China.
King Jun of
Old Chosŏn is reported to have fled to Jin after
Wiman seized his throne and established Wiman Chosŏn. Some believe that Chinese mentions of Gaeguk or Gaemaguk (蓋馬國, literally means Kingdom of armored horses, located near
Kaema Plateau) refers to Jin.
Goguryeo is said to have conquered "
Gaemaguk" in 26 CE, but this may refer to a different tribe in northern Korea. An official of Old Chosŏn called Yeok Gye Gyeong (歷谿卿), after failing to persuade
Ugeo, is said to have defected from Old Chosŏn to Jin, which is described to be located at the East of Old Chosŏn. Records are somewhat contradictory on Jin's demise: it either became the later
Jinhan, or diverged into the
Samhan as a whole. Archeological records of Jin have been found centered in territory that later became
Mahan. == Language ==