Maha Saw Lagun Ein (, ; also spelled Lagunein; d. March 1413) was a key frontline commander of the Hanthawaddy military from the 1380s to 1413. The commander led the military's vanguard land and naval forces as well as notable assassination missions against the enemies of his lord King Razadarit. He is best remembered in Burmese history for his battles against the northern Ava Kingdom in the Forty Years' War as well as his bravery and honesty. Lagun Ein was mortally wounded and captured by the Ava navy in the first battle after he was promoted to the rank of general. He had gained the deep respect of the Ava high command, which sent his body on a raft down the Irrawaddy with full military honors. Military career Coming to prominence Chronicles provide no information about his early life except that his personal name was Ma Than-Lon (မသံလုံ, ). His first mention in the Razadarit Ayedawbon chronicle comes as an officer in the Hanthawaddy military under the command of Minister-General Thamein Than-Byat in 1387–1388. According to the Burmese encyclopedia Myanma Swezon Kyan, he was from a place called Atut, in the Than-Lan township. At any rate, Than-Lon took part in King Razadarit campaign against the Martaban province (present-day Mon State and southeastern Bago Region.) Than-Lon first made his name in the second battle of Tari when he successfully led the defense of the town against the forces of Martaban. Impressed, the king ordered him to lead a mission to assassinate Ma Gyaing, governor of nearby Thanmaung town. Than-Lon returned with Ma Gyaing's head. Razadarit went on to conquer the entire Martaban province in 1388. After a brutal campaign that left the conquered region starving and ravaged, the victorious king handed out lavish awards and fiefdoms to his key officers. He appointed Than-Byat governor of Donwun with the title of Thamein Byat Za. The king also appointed Than-Lon governor of Taikkala, with the title of Lagun Ein ("He Who Is Powerful Like Sakra"). The king also gave him May Hnin Kaythaya, daughter of the rebellious viceroy Sam Lek of Donwun. List of military campaigns From then on, Lagun Ein became a key commander in the Hanthawaddy military. He was recognized for his bravery and entrusted to command the vanguard forces of the army as well as the navy. By his death, he had gained the deep respect of the Ava military.