After Hazrat Adam and Bibi Hawa the human civilization started there are total 124000 prophets the last prophet was Hazrat Muhammad ( PBUH) from this timeline to 1700 it was the time line of Muslims after Hazrat Muhammad PBUH there were four great caliphs that were called KHALIFA.E.RASHIDEEN
1 Hazrat Abu Bakar Ra
2 Hazrat Umer ra
3 Hazrat Osman ra
4 Hazrat Ali Ra
these four caliphs were the best friends of Hazrat Muhammad PBUH they grow two largest empires of that time it covered 40% of the world these were two empires
1 Abbasid Caliphate
2 Ummayad dynasty
they were great Empires