To warn John Hancock and Samuel Adams of the movements of the British Army, which was beginning a march from Boston to Lexington, ostensibly to arrest Hancock and Adams and seize the weapons stored in Concord.
Check for capitalization or something like that
The Nile was most important to the Egyptians because it delivered water and nutrients for the crops that were grown along the beds of the river itself.
Federalism
Federalism is the mixed system of government, combining a central government with regional governments in a single political system. By combining the various states into the general central government, the power of the national government increased making it strong enough to deliver