What did president roosevelt do to show u. s. military power?

He sent out the great white fleet, is the right answer.

Explanation:

The Great White Fleet was the famous nickname for the mighty Navy battle fleet of the United States. This fleet made a journey throughout the globe in the dates between 16th December 1907, to 22nd February 1909. This journey was completed on the command of the then President of the United States Theodore Roosevelt. The main aim of this fleet was to make friendly courtesy appointments to various countries while illustrating modern naval power of the United States to the world.

john locke, hope this .

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).