Mubarizun

The Mubarizun (Arabic: مبارزون, "duelists", or "champions") formed a special unit of the Rashidun army during the Muslim conquests of the 7th century.

The Mubarizun were a recognized part of the Muslim army with the purpose of engaging enemy champions in single combat.

[1] In Arab, Byzantine, and Sassanian warfare, battles usually began with duels between the champion warriors of the opposing armies.

[2] The Muslim army would typically begin battle with its soldiers first equipping their armor, assembling their units to their positions and lastly dispatching the Mubarizun.

[3] After the conclusion of the dueling phase, the army would launch its general advance.