What advantage did western countries have that them colonize other parts of the world

A. They had all the resources they needed and wanted

B. They had better military technology

C. They had a superior form of government

D. They had smaller populations

the answers is b.   environments.

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).