Widely considered the greatest swordsman that ever lived, "Miyamoto Mushashi" was the Kensia, a Samurai that is said to have over eighty kills.
Miyamoto never lost a duel, having participated in more than sixty fights, even against the Shoguns martial arts teacher, killing him with a wooden sword.
Miyamoto often used two swords together in duels, roaming the land, competing in contests against many prominent swordsmen. He also bested battles against multiple attackers, plus fighting in war.
The "Templar Knights," renowned as the world's most professional soldiers. The Templars were Christian warrior monks that fought during the Holy crusades.
Walking tanks, they were fully armored in plating, chainmail, and a helm, and equipped with a long sword, battle axe, mace, spear, dagger, and a shield. They also used lances and crossbows.
Fearless, professional, they were the medieval Specia Forces, genuine soldiers of God. Often heavily outnumbered, the enemy still fled, such as; at the battle of Bannockburn. Seven thousand Scots faced thirty-seven thousand English, it is arguably believed that one-hundred Templars came over the hill, and upon seeing this, the English army fled.
So, we will pit Mayamoto equipped with two samurai swords, against five Templar Knights equipped with sword, axe, mace, and shields.
Miyamoto has the speed advantage and renowned for his accuracy and facing several opponents at once.
The Knights have the armor advantage, with the samurai sword unable to slash through the armor, so weak, unarmored points are a must for Miyamoto to strike. However, the knights will tire quicker, due to the weight, and their vision is restricted with the helm.
Who will succeed, and how will they best the opponent?
You can come up with your own battle scenario of how this transpired, as Miyamoto often made his opponents wait to outrage them, which would make them lose focus.