How did the Crusades change trade in Europe?

Why did roosevelt support a “europe first” strategy even though it had been japan that had first attacked the united states?

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.

Where did people have to work with great organization to be successful at farming? a. on the yellow river basin c. on the hangzhou bay b. on the yangzi river basin d. on the hubei basin