The Mongols could use either a massive army for battles or use smaller groups for ambushes (like guerilla warfare) as the need arose. Also, the Mongols were very well trained in the use of horses and bows. Also, from childhood the Mongols were taught to shoot and ride.
After the Big Bang many fascinating things occurred such as primordial nucleosynthesis, the creation of the lightest elements,
and more importantly to the question at hand the rapid expansion known as the inflation. According to
this theory the universe continued expanding though at the exponentially slower
rate. The theory of inflation’s origins can be traced back to 1979, to Cornell
where it was Alan Guth who first developed it.
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The Russian revolution had tremendous effect on the continent of Europe for a long time. first immediately after the revolution, Europe was divided on the course to take and the Britain and USA attacked The Soviets. second, the type of government it created called communism divided Europe into two competing blocks after ww2.