Answer:
World leaders agreed to limit construction of large warships
It's the language barrier since Persians and kurdish people speak different languages Islam changed shia and sunni....
You are suppoesed to choose a historic person during the rennasance times in the northern area. You need to research that person and learn about their impacts or their invention's impact on the world.
I don't know if I'll type you a whole essay... but!
There are a lot of factors that contribute to the German army's early victories. One of the biggest is the amount of modernization that the German nation went through, they developed new weapons and vehicles that would help supplement their new Blitzkrieg tactics. Another factor is the fact that the Allied Nations (Britian and France) were doing their best to appease the aggressive German nation, they allowed them to breach the confines of the Treaty of Versailles and invade neighboring nations. Another factor is that Hitler had major ambitions and dreams for what he thought was possible and was in a position to have perhaps some of the greatest engineers this world has known create his crazy ideas, many of which crafted modern warfare.
The American Revolution was mainly cause by colonial opposition to the British attempt to place greater control over the colonies as well as to make them repay the crown for defending them during the French and Indian war.