It started a period of violence known as bleeding kansas
They needed to find more land for more opportunities for factories and trading. To spread their civilization to other people
In what is sometimes referred to as the "Revolution of 1800", Vice President Thomas Jefferson of the Democratic-Republican Party defeated incumbent President John Adams of the Federalist Party. The election was a realigning election that ushered in a generation of Democratic-Republican rule.
The religion in Arabia before Islam were indigenous polytheistic beliefs, Christianity, Judaism, and Iranian religions of Zoroastrianism, Mithraism, and Manichaeism. Each tribe believed in a different god. While Islam recognizes Allah as their one and only god that they believe in.
The Mongols were a nomadic tribe to the north of China. They shared the mountainous areas between China and Siberia with many other such tribes, many of them Turkic.