To make America economically independent from other countries.
US military officials expect<span> the </span>Japanese<span> to </span>attack during World War II<span> in Asia. Since these territories were closer to them.
</span>
The Social Contract Theory. It was basically an idea from John Locke and <span>Jean-Jacques Rousseau that stated the people have a right to rebel against the government if it failed to live up to it's duties. And since the United States government quote unquote is by the people for the people, they have to right to overthrow it.</span>
Ancient Greek-citizen soldiers who fought together in a phalanx were called Hoplites.
Hoplites were not professional soldiers but they comprised the bulk of ancient Greek armies of the time. They were mostly represented by free citizens such as propertied farmers and artisans who could afford the weapons and armors. Hoplites were primarily armed with shields and spears and often utilized the phalanx formation as an effective war strategy especially when battling with fewer soldiers.
The illustration below shows an example of a phalanx formation (Source: http://www.ancientgreekbattles.net/Pics/669505_PhalArgos.jpg).