Struggles for power among European empires caused a

Causes of the War • In the early 1900 s nationalism was leading European

The War Begins • The two most important alliances were the Allied powers, or

Allied and Central Powers The Allied Powers Russia France Italy Great Britain Romania Serbia

The Battlefield • When the war began many people were eager for war. •

The Battlefield • Millions of Soldiers were killed in these battles. • The fighting

America Enters the War • When WWI started in 1914 most Americans wanted to

New Weapons • • • Machine Guns Hand Grenades Tanks Submarines Airplanes

Show What You Know Time EQ: What were the causes of WW 1? EQ:

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Struggles for power among European empires caused a World War. EQ: What were the causes of WW 1? EQ: What methods of fights did the Allied and Central Powers use? EQ: Why did the United States enter WWI? SS 5 H 4 a

Causes of the War • In the early 1900 s nationalism was leading European countries to war. • Countries such as Germany, Russia, and France competed for land power. • To protect their empires, the nations started build up their armies which is called militarism. • They also began to form alliances.

The War Begins • The two most important alliances were the Allied powers, or Allies, and the Central Powers. • In 1914, Austria-Hungary, one of the central powers, declared war on Serbia had an alliance with Russia, so Russia fought on Serbia’s side. Then, Germany, also a Central Power invaded Belgium and France was allied with Russia. World War I had begun.

Allied and Central Powers The Allied Powers Russia France Italy Great Britain Romania Serbia Portugal The Central Powers Germany Austria- Hungary Bulgaria The Ottoman Empire

The Battlefield • When the war began many people were eager for war. • Because of strong Nationalism in Europe, thousands of young men signed up to serve in the military. • Soldiers on both sides fought in long narrow ditches called trenches. • This was called trench warfare.

The Battlefield • Millions of Soldiers were killed in these battles. • The fighting lasted for 4 years. • With trench warfare soldiers lived in the trenches day and night. • The mud, cold weather and rats made life hard.

America Enters the War • When WWI started in 1914 most Americans wanted to stay out of it. • In 1915 a German submarine sank the Lusitania. It was a British passenger ship with many Americans on Board. People were shocked angry. • The United States entered World War I in 1917 on the side of the Allies.

New Weapons • • • Machine Guns Hand Grenades Tanks Submarines Airplanes

Show What You Know Time EQ: What were the causes of WW 1? EQ: Why did the United States enter WWI? Bonus: What methods of fights did the Allied and Central Powers use?