Roosevelt captured America's attention when he participated in which historical event?

He successfullycharged at the Spanish fleet at Manila Bay

He and his cohorts won the Battle of San Juan Hill.

He led the army to capture the island of Puerto Rico and end the fighting in August, 1898

He declared war against Spain appeasing U.S. public opinion.

He successfully charged at the Spanish fleet at Manila Bay.

Explanation:

The Spanish-American War started in the uprising against Spanish rule that began in Cuba in the year of 1895. The  Navy of the United States was well trained and well supplied, primarily by the ambitious efforts of the young Navy Assistant Secretary, Theodore Roosevelt, who had assigned Dewey to lead the Asian Squadron. The young navy Assistant secretory earned respect of the nation during the Battle of Manila Bay.

There was fear and prejudice towards the Germans and Communist and that expanded to include all immigrants.  They signed the Emergency Quota Act, which limited immigration: only allowing a certain percentage of ethnic groups into the united states.