In general, government that followed the idea of laissez-faire in economic matters would not regulate business, or ensure that there was fair competition existing in the market place, since they would be rather "hands off" in the economy.
To encourage domestic stability and promoting a free market economy.
The Vietnam war was an issue that arose from WW2.
Spain renounced all claim to Cuba, ceded Guam and Puerto Rico to the United States, and transferred sovereignty over the Philippines to the United States for $20 million
