The Crusades were a Military expedition that was led by the Christians to claim the Holy Land from the Muslims there were three Crusades the Christians only won one of the battles so the Muslims took the Holy Land.
They were traditionally destroyed upon the death of the man who carved them and remain rare items
The two-state solution is an idea that Israel and Palestine would live next to each other with secure borders and respectful of each other. The idea is noble and surely better than the situation that exists nowadays, however the prospect of success depends on their willingness to stick to a two-state plan that would be devised. It would be possible for a two-state solution to exist with the help of an international union like the UN to help enforce the idea of two-states.
Spain did not because they were not involved in the second world war, they already had their own civil war going on.
World War II caused a massive reshifting in the world order in that prior to World War II, there were a number of world powers.
After World War II, only the United States and the Soviet Union remained as true world powers.
