Salman al-Farsi

The Battle of Khandaq (627 CE), also called the Battle of the Trench, was a twenty-seven-day siege of Medina by a coalition of some ten thousand Quraysh and allied tribes. On Salman al-Farsi's advice the Muslims dug a defensive trench, and the coalition withdrew without a decisive battle.

Salman al-Farsi (568-656 CE), known as 'Salman the Persian,' a former Zoroastrian priest who became one of Prophet Muhammad's most beloved companions, famous for suggesting the trench strategy at the Battle of Khandaq and representing the universal nature of Islam beyond Arab ethnicity.