三燕是指4世纪初到5世纪初主要存在于辽西地区的三个慕容鲜卑政权的统称,即前燕(337～370年)、后燕(384～407年)和北燕(407～436年)。三燕的历史虽然不足百年,但是其特殊的地理位置使其成为十六国时期中原与朝鲜半岛诸国文化交流的桥梁和纽带。特别是这一时期政权割据、战争频繁,重装骑兵开始出现,三燕以其独特的马具和甲胄系统在诸多战争中发挥了作用,三燕马具和甲胄经高句丽传人朝鲜半 Sanyan refers to the general name of the three Murong Xianbei regimes that existed mainly in western Liaoning from the early 4th century to the early 5 th century, namely Qian Yan (337-370), Hou Yan (384-407) and Beiyan (407-436 year). Although the history of Sanyan is less than a century, its special geographical location has made it a bridge and link for the cultural exchange between the Central Plains and the Korean Peninsula during the 16-nation period. Especially during this period of regime separatism, frequent war, heavy cavalry began to appear, San Yan with its unique harness and armor system played a role in many wars, San Yan harness and armor by Koguryo descendants of North Korea