Sayyiduna Umar (radi Allahu anhu) sent Sayyiduna Abu Ubaidah (radi Allahu anhu), as Commander, to deal with the
situation. Both the Persian columns were defeated. Rustam sent an even larger army and defeated the Muslims.
Sayyiduna Umar (radi Allahu anhu) raised another army and defeated the Persians. But the Persian court sent yet
another larger army, and forced Sayyiduna Muthanna (radi Allahu anhu) to withdraw. The report of the new situation
was sent to Sayyiduna Umar (radi Allahu anhu) and reinforcements under the command of Sayyiduna Saad bin Abi
Waqqas (radi Allahu anhu) were sent.
The Persian and Muslim army met at Qadisiyah. After a long battle on several fronts, the outnumbered Muslim army
defeated the 120 000 Persian soldiers and recaptured Hirah and their areas in the year 14 A.H. (636 C.E).