Answer:
To have a strong economy and military in the world.
Explanation:
The United States of America tried to become a world superpower by making its economy strong through technology, having a strong military with advance weapons and has great influence on other countries. Strong economy enables United States of America to start wars against its rivals such as Russia, Spain, Korea, Vietnam and Afghanistan and controls the strategic points of the world to give tough time to their rivals.
No the Milky Way galaxy has not merged with any other galaxy
The steamboat represented an important phase in the development of shipping. hope this helps.
