Middle Ages

Islam

Islam was created by Muhammed. Muhammad was a merchant in Mecca, Arabia. He knew Cristianity and Juidism. He moved to Medina because people thought Islam was dangerous so he was persecuted. After six years, he returned with a powerful army. He conquered Arabia and Islam expanded quickly.
Islam had only one god called Allah. Their sacred book was called Koran. There were five obligations which islamic followers had to do, the five pillars:

1. Shahadah:to testify 'there is no other God but Allah and Muhammad is his prophet'.
2. Salah: to pray 5 times a day.
3. Hajj: to go on a pilgramage to Mecca at least once in their lifetime if possible.
4. Sawm: to fast during the month of Rammadan.
5. Zakah: to give alms to the poor.

Islam was extended though jihad or holy war. Nowadays, only extremist groups believe in this idea.