the pope
Germany declared war on the US, the US then declared war on Germany.
Hiter's invaded Poland so Britain and France declared war on Germany to stop German expansionism.
The Archduke Franz Ferdinand of Austria was assassinated by a Serbian. The Austrians declared war and Russia tried to help. Germany, under treaty told the Russians to stop and attacked Belgium, France and declared war on Russia.
Austria declared war on Serbia because Serbian Gavrilo Princip had assassinated the archduke Franz Ferdinand and his wife in Austria in 1914. The war was declared on Serbia. Russia responded by aiding Serbia. Then Germany sent ultimatum to Russia demanding Russia to stop mobilizing and once the ultimatum was rejected by the Russians, Germany declared war on Russia.
War was declared.
After Japan bombed Pearl Harbor we declared war on them. Germany was an ally of Japan so they declared war on us. Italy was an ally of Germany so they went along with Germany and declared war.
The US Civil War was an un-declared war.
WWII was America's last declared war.
WWII was America's last declared war. Prior to WWII, the American Civil War (aka US Civil War) was NOT a declared war. Actually, prior to WWII, the war was called the "Cold War", but was not a declared war.
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.
No. Hitler declared war on the U.S. in December of 1941. The U.S. did not enter the war to stop the murder of the Jews.
no, japan did not formally declare war Germany declared war on u.s. after u.s. declared war on japan