(A) Militarism
(B) ** Imperialism
(C) Nation building
(D) Alliances
EXPLANATIONS BELOW
Concept note-1: -What is imperialism in history? Imperialism is the state policy, practice, or advocacy of extending power and dominion, especially by direct territorial acquisition or by gaining political and economic control of other territories and peoples.
Concept note-2: -Imperialism, sometimes called empire building, is the practice of a nation forcefully imposing its rule or authority over other nations.
Concept note-3: -Imperialism is when one country exercises power over another through various methods of control. It describes an economic, political, and social system in which one country subjugates others, and brings them under its control.
Concept note-4: -Three main forms of imperialism that developed were: Colonies. Protectorates. Spheres of influence.
Concept note-5: -Imperialism is the process of forcibly expanding state authority over autonomous foreign territory by means of military conquest. More broadly, imperialism is the complex of practices through which one population establishes and maintains instrumental control over the spaces, resources, and everyday lives of another.