Based on the excerpt do you read in part a and the one you just read how did truman‘s

After world war I, the international politics took a turn and the economic and political scenario was changing rapidly. The war of independence started in many countries as an aftermath of war and nations stood up for economic liberty and independence. As a result, a fight for power and money started among European nations and United states also work towards expansion of its power politics and increase its influence on resources of nations across the globe.

Explanation:

During the periods between 1865- 1910, US expanded its role in international politics with the intention to civilize the nations. Therefore, the US government machinery was dedicated to influence nations through their power, aid and trading opportunities.