The document describes a battle between Muslim and Persian armies at Al-Qadisiya in the 14th year after Hijra (636 AD). It details the lead up and four days of fighting, including key commanders on both sides. The Persians initially had a larger army and advantages like elephants, but the Muslims prevailed through strategic leadership and acts of bravery, culminating in their victory on the fourth day of battle at Al-Qadisiya.