Eastern and Western
The Byzantine emperor Alexius Comnenus wrote a letter to the council of Piacenza in 1095 asking for help to free the christians in Jerusalem from persucation of the Muslims. The pope, Urban II gave permission to kill the infidels (the muslims) at the council of clermont and this caused this mass expedition which followed into the capture of Jerusalem. This first expedition was the bowling ball for all of the other crusades that have followed.
The eastern part of the Roman empire fell in 1453 to the Ottoman Turks who took Constantinople. Prior to this the Eastern Roman Empire had gradually been loosing territory to successive invaders: the Arabs had taken the Middle East south of Turkey and Egypt, the Bulgars, Serbs and Croats had taken the Balkans and the Seljuk Turks had taken a big chunk of Turkey. The Ottoman Turks took over form the Seljuk Turks, completed the conquest of Turkey and dealt the final blow.
gravity
No natural disasters occurred in 366. In 365, a massive undersea earthquake near Crete caused a tsunami that hit the coasts of the Eastern Mediterranean. It is estimated that the magnitude of the easthquake was eight or higher, In Crete nearly all towns were destroyed. There was widespread destruction in central and southern Greece, northern Libya, Egypt, Cyprus,and Sicily.
the hemisphere
they were eating their foods
Because during that season, the northern Hemisphere is closer to the sun. This is caused by the earth's axis tilt.
The seasons in the northern and southern hemispheres are opposite because of the tilt of the Earth's axis. When one hemisphere is tilted towards the Sun, it experiences summer, while the other hemisphere is tilted away and experiences winter. The tilt causes variations in sunlight intensity and day length, leading to the seasonal changes we observe.
This is caused by the difference in position of the earth's tilt to the sun. When the northern hemisphere is tilting towards the sun (summer), the Southern Hemisphere is tilting away from it (winter) and vice-versa.
they spin to the right caused by the coriolis affect
The Greeks went on an extended looting expedition of Asia Minor.
the production of the first accurate maps of the Northwest
The wars in the eastern woodlands were caused over women to reproduce with, much like the Rape of the Sabines for Rome, and war was also caused by agressive child soldiers lead by Kony.
Religion
Because he led an expedition that caused the fall of the Aztec empire.
Usually, this is caused by driving through mud or water.