The migration of prophet Muhammad (PBUH) from Makkah (or Mecca) to AlMadinah (or Medina) in Saudi Arabia
the run of Mohammed from mecca to medina (622 a.C.)
Muhammad's Hijrah.
Paleozoic
The end of an era, or the beginning of an era, is any time marked by a distinctive character. The Roman era. The use of steam power marked the beginning of an era. The Middle Ages is also referred to as the Medieval era. The Neolithic era, 3000 to 1800 bc
The beginning of Earth's current era is marked by a mass extinction.
Augustus Caesar could be said to have marked the end of one form of government and the beginning of another. He could also be said to have marked the end of republican civil wars and the beginning of an era of peace and prosperity.
After years of stressful work as chairperson Wanda's retirement marked the beginning of a new era in her life known as halcyon.
An asteroid impact
A mass extinction
the movement for women's rights
The Age of Discovery marked the beginning of European exploration and conquests in the Americas and the rise of a more interconnected global economy.
The Era of Good Feelings was marked by a strong sense of national unity.
It marked the beginning of the Texas Revolution.
It marked the beginning of the women's suffrage movement.