Plains Indians lived in tipis, which could easily be taken down and transported when necessary. They had incredible horse-riding and archery skills, which allowed them to effectively hunt buffalo and travel across the Plains. Finally, they developed skills which allowed them to utilise every part of the buffalo.
What ultimately brought the US out of its neutrality was when the Germans wanted to stop supplies from getting to Great Britain from the US. So, they sunk the supply ships which also had hundreds of Americans on board which the Germans killed altogether (triggering their anger and causing them to join the war).
A country that follows Sharia must closely integrate the teachings of Islam and its legal system.
Religion and law are closely intertwined in Muslim countries, which is can be seen clearly that when a person breaks a religious law (like cheating), they will be legally prosecuted as well, because those two are so connected.