Nationalism is best understood as when a group of people identify with each other and show loyalty to their country or community. Nationalism develops when people share similar ideals, principles, ethnic heritage, property, language, customs and traditions. Tensions had been sparked by the rise of nationalism that took place in Europe in the decades before World War 1

Imperialism is known as a process in which a country overtakes the political, economic, or social life of another country or region. Imperialism was carried out in the decades before World War 1 by the powerful European nations against the rest of the world.

When the first world war began Europe was divided into two separate alliance systems. The Triple Entente was made up of germany, austria-hungary, and italy. All sets of partnerships between the supporting countries were established the years and decades before World War 1.

Besides the arms race, there was also a competitive naval war between Britain and Germany.

Paying the War:The U.S. would spend more than $30 billion on fighting during the World War 1. In 1913, a personal income tax had been introduced in the constitution in the 16th amendment. Wartime increases in tax rates significantly increased government-collected funds.

Production: The military and private industry didn't work together to address industrial needs and the distribution of materials and goods has been totally disorganised. President Wilson formed the War Industry Board to set production standards and organize rail and shipping efforts.

Conservation measures:The agency promoted voluntary measures, such as meatless Mondays and wheatless Wednesdays. It offered canning lessons and modified recipes, and encouraged Americans to plant vegetable gardens in yards and vacant spaces.

Service:In the windows of homes throughout America, american flags were displayed, adorned with a blue star for every family member in the military that lost their life.

Propaganda:The committee produced articles,posters, pamphlets ,films ,speeches, and rallies which promoted the Allied cause and painted the Central Powers (especially Germany) as enemies of democracy and civilization.

Gavrilo Princip, a representative of a serbian nationalist terrorist group fighting against the rule of Austria-Hungary over Bosnia, assassinated Archduke Franz Ferdinand, he was next in line to the throne and was very influential. He was a target because many people in Balkans were furious with the takeover of Bosnia by Austria a Few years earlier.

In mid-August 1914, Russia's choice to undertake prematurely on military activities on the Eastern front acquired breathing space in Belgium and France out of its western allies.

Battles in the Eastern front happened mainly between German, Russian, and Austro-hungarian armies.