The Heroic Legend of Arslan

is a Japanese fantasy novel series written by Yoshiki Tanaka. They were published from 1986 to 2017. A Original Video Animation adaptation by Animate Film & J.C.Staff aired from August 17, 1991 to September 21, 1995. A manga adaptation by written by Tanaka Yoshiki and illustrated by Nakamura Chisato. It was serialized in Asuka Fantasy DX from November 1991 to September 1996. A second manga adaptation by written by Tanaka Yoshiki and illustrated by Arakawa Hiromu. It is serialized in Bessatsu Shounen Magazine from Jul 9, 2013. An anime adaption of the second manga by SANZIGEN and LIDENFILMS aired from April 5, 2015 to September 27, 2015. A second anime season titled Fuujin Ranbu aired from July 3, 2016 to August 21, 2016. An OVA spin off aired from May 9, 2016 to Nov 9, 2016.

Plot
The story follows the exploits of Arslan, the crown prince of the fictional kingdom of Palse, which is taken over by the neighboring nation of Lusitania after his father, the king Andragoras, falls victim of a treacherous plot led by one of his most trusted retainers. After barely escaping with his life, Arslan rejoins his loyal servant, Daryoon. Backed up by only a few more companions, including the philosopher/swordsman/tactician Narsus and his young servant Elam, Pharangese, an aloof, cold priestess and Gieve, a travelling musician and con-man, Arslan must stand against overwhelming odds to assemble an army strong enough to liberate his nation from the Lusitanian army which is led by the elusive warrior known as "Silvermask".

Other Sources
Wikipedia