What was the economy of the middle ages, what was the reasons for trade, and how goods and services were provided

The byzantine empire weakened after asia minor

What was the national government’s biggest concern if facing a war, under the articles of confederation? the national government had no national military. the country had grown too large to defend with a small army. the states would not back the federal government. there was no way the states would pay for fighting a war.

Explain how scientist from the scientific revolution and the catholic church tie together