<span>The main reasons for adopting the new calendar included those that were secular in nature. The secular nature was that church was not as big of a part of people's lives, and this was reflected in the creation of the new calendar. The calendar replaced the Gregorian calendar which was religious in nature and did not focus on scientific ideals.</span>
They wanted to protect United states trading opportunities in China.
Islam originated in Mecca and Medina, Saudi Arabia.
the crusade Lasted from 1096 till 1099
