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*Austria declared war on Serbia

*Germany supports Austria

*Russia helps Serbia

*Germany declares war on Russia

*France joins Russia

*Germany invades Belgium.

*Britain declares war on Germany for invading Belgium because Britain & Belgium had an agreement of protection

*then Italy, Japan and USA

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13y ago
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11y ago

Japan, the US, and the Italians. ( Italy.)

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12y ago

Germany, Austria-Hungary, Russia, Serbia, Great Britain, Ottoman Empire, Australia, Canada, United States of America, Ukraine

Italy, france, and japan. xox

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Q: What countries joined World War 1?
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Related questions

What countries joined in World War 1 and 2?

There were over 100 countries involved in WW1 There were 57countries involved in WW2

What country departed from world war 1 in 1914?

No country left the war in 1914. Countries joined the war in 1914, the year it began.

What neutral countries later joined the Allies in World War 1?

The United States joined the Allies in December 1941 .. HELP TO FIND THE OTHER COUNTRY

What countries were part of allied powers in World War 1?

The alliance was between Britain, France, and Russia. Later joined the United States during World War I.

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When did Russia join World War I?

Russia joined world war 1 in 1914

What was the other side in the world war 1 besides central powers?

allied countries (great Britain,France,russia and japan joined in weeks later,and Italy joined later)

When the US join World War 1?

They joined the war in 1917.

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They joined the war in 1917.

When did the US joined world war 1?

In 1927

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The main countries that were first in ww1 ere France, Germany, Britain, and Russia. Later on other countries, including American, joined the conflict.

Which country joined world war 1 one year before it ended?

the USA Joined the war in 1917