How did Alfred Thayer Mahan help in the creation of an American empire

He provided three strategies that would  greatly increase America's sea power.

Explanation:

Alfred Thayer Mahan was a United States military  officer. He gained his fame due to his strategic capability in US' army. His skill even acknowledged by other strategic officers in Dominant European countries such as France and Great Britain.

Throughout his career, he brought important awareness to the potential of America's sea territory. He believed that the country should use it for three main reason :

- National defense:

To prevent an attack from foreign enemies before they reach US Soil.

- Peace Keeping:

To provide helps to allied countries that need it.

- Commercial:

He advocated an important use of sea routes for trades and resource distribution.

probably 3 since archeologists and historians don’t understand there writing.