(A) Militarism
(B) ** Alliances
(C) Imperialism
(D) Nationalism
EXPLANATIONS BELOW
Concept note-1: -This list is an overview of the most popular reasons that are cited as the root causes of World War 1. Austria-Hungary declared war on Serbia, Russia got involved to defend Serbia. Germany seeing Russia mobilizing, declared war on Russia. France was then drawn in against Germany and Austria-Hungary.
Concept note-2: -The assassination of Franz Ferdinand stoked old tensions beyond the Balkans. The crisis spread as other powers pledged support for either Austria or Serbia. Austria knew that conflict with Serbia would likely involve Russia, which saw itself as Serbia’s protector. Austria-Hungary turned to its own ally.
Concept note-3: -Alliances provided European states with a measure of protection. They served as a means of guarding or advancing national interests while acting as a deterrent to war. They were particularly important for Europe’s smaller or less powerful states.
Concept note-4: -Alliances Prior to World War I World War I had two main factions: the Central Powers, which included Germany, Austria-Hungary, Bulgaria and the Ottoman Empire; and the Allies, which included France, Great Britain, Russia, Italy, Japan and later, the United States.