Answer:
April 12, 1861 – May 9, 1865
Explanation:
he United States entered the war because of the Germans' decision to resume the policy of unrestricted submarine warfare, and the so-called "Zimmerman telegram," intercepted by the British, in which Germany floated the idea of an alliance with Mexico.
His first National Park was Crater Lake National Park. Roosevelt was always known as the Conservation President.
