answersLogoWhite

0

Around 30 countries across the globe.

Australia
Entered war together with Britain on 4 August 1914

Austria-Hungary
Declared war with Serbia on 28 July 1914
Declared war with Russia on 6 August 1914
Declared war with Belgium on 28 August 1914
Declared war with Portugal on 15 March 1916

Belgium
Invaded by Germany on 3 August 1914

Brazil
Severed relations with Germany on 11 April 1917
Declared war with Germany on 26 October 1917

Bulgaria
Declared war with Serbia on 14 October 1915
Declared war with Romania on 1 September 1916

Canada
Entered war together with Britain on 4 August 1914

China
Severed relations with Germany on 14 March 1917
Declared war with Germany on 14 August 1917
Declared war with Austria-Hungary on 14 August 1917

Costa Rica
Severed relations with Germany on 21 September 1917
Declared war with Germany on 23 May 1918

Cuba
Declared war with Germany on 7 April 1917

France

Invaded by Germany on 2 August 1914
Declared war with Austria-Hungary on 12 August 1914
Declared war with Turkey on 5 November 1914
Declared war with Bulgaria on 16 October 1915

Germany
Declared war with Russia on 1 August 1914
Declared war with France on 3 August 1914
Declared war with Belgium on 4 August 1914
Declared war with Portugal on 9 March 1916

Greece
Declared war with Austria-Hungary on 27 June 1917
Declared war with Bulgaria on 27 June 1917
Declared war with Germany on 27 June 1917
Declared war with Turkey on 27 June 1917

Guatemala
Declared war with Germany on 23 April 1918

Haiti
Declared war with Germany on 12 July 1918

Honduras
Declared war with Germany on 19 July 1918

Italy
Declared war with Austria-Hungary on 23 May 1915
Declared war with Turkey on 21 August 1915
Declared war with Germany on 28 August 1915
Declared war with Bulgaria on 19 October 1915

Japan
Declared war with Germany on 23 August 1914
Declared war with Austria-Hungary on 25 August 1914

Liberia
Declared war with Germany on 4 August 1914

Montenegro
Declared war with Austria-Hungary on 5 August 1914
Declared war with Germany on 8 August 1914
Declared war with Bulgaria on 15 October 1915

New Zealand
Entered war together with Britain on 4 August 1914

Nicaragua
Declared war with Austria-Hungary on 8 May 1918
Declared war with Germany on 8 May 1918

Panama
Declared war with Germany on 7 April 1917
Declared war with Austria-Hungary on 10 December 1917

Portugal
Entered war against Germany on 9 March 1916
Entered war against Austria-Hungary on 15 March 1916

Romania
Declared war with Austria-Hungary on 27 August 1916
Exited war with Treaty of Bucharest on 7 May 1918
Re-entered the war on 10 November 1918

Russia
Declared war with Turkey on 2 November 1914
Declared war with Bulgaria on 19 October 1915

San Marino
Declared war with Austria-Hungary on 3 June 1915

Serbia
Declared war with Germany on 6 August 1914
Declared war with Turkey on 2 November 1914

Siam
Declared war with Austria-Hungary on 22 July 1917
Declared war with Germany on 22 July 1917

Turkey
Declared war with Romania on 30 August 1916
Severed relations with United States on 23 April 1917

United Kingdom
Declared war with Germany on 4 August 1914
Declared war with Austria-Hungary on 12 August 1914
Declared war with Turkey on 5 November 1914
Declared war with Bulgaria on 15 October 1915

United States of America
Declared war with Germany on 6 April 1917
Declared war with Austria-Hungary on 7 December 1917

User Avatar

Wiki User

11y ago

What else can I help you with?

Related Questions

What are the 2 countries which involved in World War 1?

there were many countries that were involved in WW1, like: france, germany, russia, prussia, america, england etc.


What countries joined in World War 1 and 2?

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


Group of countries not involved with ww1?

America, Germany, Your mother, Japan


How many people were involved with WW1?

99,000,000


What are the countries involved in the allied powers in ww1?

US (IN LATER YEARS) Great Britain, France, Russia, China, and many other minor countries that didnt affect it much =)


Why it was named World War 2?

Because it involved so many countries in so many parts of the world. WW1 was 1914 to 1918. WW2 1939 to 1945


Which countries were all involved in World War 1 and 2?

There were over 100 in WW1 and 57 in WW2


Leaders involved in world war 1?

who were the leaders involved in WW1 who were the leaders involved in WW1


How many people from nations other than USA died in World War 1?

There were 23 countries involved in WW1 and there is a list with all of the casulties on the web link.


What countries were involved in the Russian Revolution?

The only country directly involved in the Russian Revolution was Russia itself. Germany did help Vladimir Lenin get into Russia and then funded his revolutionary operations, but it was not truly involved as a nation.


Why is World War 2 considered a bad war?

Because multiple countries are involved in it. Just like WW1. WW2 has involved in many European countries such as Germany, Japan, Italy. Opposing them were the US, Britain, Russia, many more countries unlisted.


Who were the first countries to get involved in world war 1?

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