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
It isthe historians and commentators that use the label world war. It's only a nickname for a reallymajor warand it has no legal status at all.
When all of the major powers are involved and usually, when the war takes place all over the world...like WWII did.
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.
Germany declared war on the US after Pearl Harbour.
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.