Talk about the three G's; Gold, Glory, and God.
Also, at the time, land was equal to power. The more land you had, the richer you were. This is a social and political reason, as well as economic.
Hope this helps you. Ask any questions if you need to!
Answer:
After the war began, German foreign policy aimed to strengthen existing alliances, build new ones, and obtain the cooperation of its allies and of the nations it conquered not only in Germany's war effort but also in its racial policies, especially the annihilation of the Jews.
<span>The National Firearms Act</span>
One thing that happened during the Crusaders was a temporary unification of muslim forces under the banner of a famous general called Saladin. He unified muslim forces which were fighting each other (most notably Seljuk Turks with their minor skirmishes before the First Crusade) and managed to create one united muslim force.