What city is considered the birthplace of the California gold rush?

American troops were worried about cantracting in cuba a. yellow fever b. hepatitis c. polio

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.

In which era does vietnam war fought and what was the reason?