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I will only list the more important countries involved in the war because there were many minor countries that are of very little importance to the war.
Austria-Hungary declared war on Serbia July 28 1914
Russia declared war on Austria-Hungary July 30 1914
Germany declared war on Russia August 1 1914
Germany declared war on France August 3 1914
Germany declared war on Belgium August 4 1914
Britain declared war on Germany August 4 1914
Montenegro declared war on Austria-Hungary August 5 1914
Serbia declared war on Germany August 6 1914
Montenegro declared war on August 9 1914
France declared war on Austria-Hungary August 11 1914
Britain declared war on Austria-Hungary August 12 1914
Austria-Hungary declared war on Belgium August 22 1914
Japan declared war on Germany August 23 1914
Japan declared war on Austria-Hungary August 25 1914
Russia declared war on Ottoman Empire November 1 1914
Serbia declared war on Ottoman Empire November 2 1914
Montenegro declared war on Ottoman Empire November 3 1914
Britain declared war on Ottoman Empire November 5 1914
France declared war on Ottoman Empire November 5 1914
Italy declared war on Austria-Hungary May 23 1915
Italy declared war on Ottoman Empire August 21 1915
Bulgaria declared war on Serbia October 14 1915
Britain declared war on Bulgaria October 15 1915
Montenegro declared war on Bulgaria October 15 1915
France declared war on Bulgaria October 16 1915
Italy declared war on Bulgaria October 19 1915
Russia declared war on Bulgaria October 19 1915
Romania declared war on Austria-Hungary August 27 1916
Italy declared war on Germany August 27 1916
Germany declared war on Romania August 28 1916
Ottoman Empire declared war on Romania August 20 1916
Bulgaria declared war on Romania September 1 1916
United States declared war on Germany April 6 1917
United States declared war on Austria-Hungary December 7 1917
The Armistice occurred November 18 1918
Note: where Britain is listed, this includes declarations of war by British Dominions also(Canada, Australia, New Zealand, South Africa and India), as they were not completely independent during the First World War and couldn't conduct Foreign Policy themselves.
What else can I help you with?
What date did the soldiers go off to fight in World War 1?
well the whole world was fighting so they might have send some to other countries
What date did Poland got involved in World War 2?
Germany invaded Poland on September 1, 1939. This event marked the de-facto beginning of World War II.
What date did pearl harbor enter the war?
December 7th, 1941
What was the date and 1st state to enter the union?
Delaware Dec 7th 1787
What date was Georgia admitted into the union and what number state was it?
January 2, 1788 and was the 4th state to enter.
What date did turkey enter World War 1?
in 1915
Who player has represented two countries in a cricket World Cup till date?
Kepler Wessels has to date represented two countries in the Cricket World Cup.
What was the date of the event that promoted the US to enter World war II?
7th December, 1941. A date which will live in infamy --
What date did pearl harbor enter the world war 2?
December 7, 1941
How many countries has the Word of Life Ministries reached to date?
The World of Life ministry fellowship has out reached to many countries around the world. Approximately 62 countries have been reached out by this organization.
What date did France enter World War 2?
France was invaded on May 10, 1940 by the Nazis.
When did the US get involved World War 2?
December 8, 1941 was the date of the US declaration of war
How many times do you enter after the date on a business letter?
You are to enter 2 to 4 times after the date on a business letter.
What was date of the Pearl Harbor?
it was the bombing in world war 2 that got america involved in the war that had already begun
When you enter a date excel assigns a what value to the date?
numerical
When you enter a date Excel assigns a?
a serial value to the date
Write a c program to findout a date after adding 31 days to a date in the month of february also consider the leap year?
#include<iostream.h> main() { int year,date; cout<<"enter year\n"; cin>>year; cout<<"enter date\n"; cin>>date; if(year%4==0) date=date+2; else date=date+3; cout<<" the added date was"<<date\n; } output: enter year:2011 enter date:18 the added date was:21. Note: This program exectues only in cpp....
