Respuesta :

Answer: George Washington, the first President of the United States of America led the country during the American Revolution from 1775 and 1783.

Explanation: The Mexican American War took place under the presidency of James K. Polk from 1846 to 1848. The US Civil War was held between 1861 to 1865 during Abraham Lincoln's presidency

Answer:

Who was president of the US when the war began?

✔ Abraham Lincoln

Why did Lincoln grow frustrated with his top general, George McClellan?

He believed that McClellan was too cautious and not taking enough chances to win.

Explanation: