The territorial expansion of the US and the question of whether or not slavery would be allowed in the new territories was perhaps the single greatest factor leading up to the war, since before expansion, slavery was mostly confined to the South.
European leaders responded to Islamic expansion in a very violent way. Following the initial incursions of the Islamic forces in those years, the European leaders decided it was time to take up arms and fight them in their own lands - what followed were the Crusades.
Answer: At the point when earth was first framed, its environment was reasonable made out of hydrogen, helium, and different gases that contained hydrogen. ... Throughout an immense measure of time, a long period of time, the earth steadily cooled. At the point when the temperature dropped enough, water fume consolidated and went from a gas to fluid structure. This made mists.