What two events led the US into World War I?

What is the biggest difference in citiz en participation in government between ancient athens and the modern united states?

How did the united states obtained the purchase of floridia to extand its frontiers to the pacific ocean

Hich explains why the constitution gave congress the power to create a system of federal courts? the constitution wanted congress to share power with the judicial branch. the constitution anticipated the need for courts lower than the supreme court. the constitution wanted congress to share power with the appellate courts. the constitution anticipated the need for courts equal to the supreme court.