Alright, the more political/sensible answer that i would thought of is when the whole world, i mean the whole world is affected.
For such cases like the recent Iraq War is not really a world war. But according to history records, World War 1 & 2 are define as 'world wars' is because they involved most major power countries (capable of causing military destructive) to the world are involved such as 'Russia, US, British, Germany etc' and other countries which are co-dependant on each other were greatly affected due to the fact that the main countries would be concentrating on the war, not so much concern about other matters around the world. Therefore other countries would became 'stagant' in a way. If all the countries are affected by the war and Half the world is invovled in the war then it is a world war
europe
The U.S. has formally declared war five sepate times: War of 1812, Mexican-American War, Spanish-American War, World War I, and World War II.During World War II the U.S. declared war against Japan on December 8, 1941, Germany and Italy on December 11, 1941, Bulgaria, Hungary and Romania on June 5, 1942.
Are you serious? The USA!
President Franklin Delano Roosevelt was president when World War II began.
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 1914Russia declared war on Austria-Hungary July 30 1914Germany declared war on Russia August 1 1914Germany declared war on France August 3 1914Germany declared war on Belgium August 4 1914Britain declared war on Germany August 4 1914Montenegro declared war on Austria-Hungary August 5 1914Serbia declared war on Germany August 6 1914Montenegro declared war on August 9 1914France declared war on Austria-Hungary August 11 1914Britain declared war on Austria-Hungary August 12 1914Austria-Hungary declared war on Belgium August 22 1914Japan declared war on Germany August 23 1914Japan declared war on Austria-Hungary August 25 1914Russia declared war on Ottoman Empire November 1 1914Serbia declared war on Ottoman Empire November 2 1914Montenegro declared war on Ottoman Empire November 3 1914Britain declared war on Ottoman Empire November 5 1914France declared war on Ottoman Empire November 5 1914Italy declared war on Austria-Hungary May 23 1915Italy declared war on Ottoman Empire August 21 1915Bulgaria declared war on Serbia October 14 1915Britain declared war on Bulgaria October 15 1915Montenegro declared war on Bulgaria October 15 1915France declared war on Bulgaria October 16 1915Italy declared war on Bulgaria October 19 1915Russia declared war on Bulgaria October 19 1915Romania declared war on Austria-Hungary August 27 1916Italy declared war on Germany August 27 1916Germany declared war on Romania August 28 1916Ottoman Empire declared war on Romania August 20 1916Bulgaria declared war on Romania September 1 1916United States declared war on Germany April 6 1917United States declared war on Austria-Hungary December 7 1917The Armistice occurred November 18 1918Note: 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.
War was declared.
no, japan did not formally declare war Germany declared war on u.s. after u.s. declared war on japan
It was the piece of paper that declared war or the 2. It was the piece of paper that declared war or the 2. It was the piece of paper that declared war or the 2.
Australia declared war on Germany as well.
In World War 2?
The prime minister of Britain declared war in Germany. The world war 2 started by Germany in a unprovoked attack on poland.
There has never been a World War 3.
If this question is in reference to World War II, most countries declared war on Germany because Germany declared war on them.
The cold war was NOT declared. The cold war was not a war. The cold war was simply a name given to "a non-shooting" military stand off between the communist world and the free world.
Franklin D. Roosevelt declared war because Japan attacked Pearl Harbor.
World War 2 started on 1 September 1939 when Germany invaded Poland. Britain and France then declared war on Germany on 3 September 1939.
Austro-Hungarian Archduke Franz Ferdinand was assinated by Serbian nationalists. Austria declared war on Serbia. Russia, allied with Serbia, declared war on Austria, Germany declared war on Russia, England and France declared war on Both.