Austria attacked Serbia because the heir to the Austrian throne was murdered by a terrorist whose organization had ties to the Serbian government. Perhaps the two people I've pinged would like to comment further on the origins, causes, and development of World War I.
The following historical facts are undeniable:
(1) Germany attacked the Lusitania in 1915 because German intelligence had discovered that it was carrying arms to Britain in violation of international law and Wilson's alleged "neutrality." Therefore, Germany had every right to do so, and this cannot be considered a justification for American entry into the war.
(2) The Wilson administration made the abolition of the German monarchy a condition of peace. The Allies made it very clear that they wanted the German and Austrian monarchies abolished. Therefore, it is entirely appropriate to blame Wilson and the Allies for the disastrous consequences of the abolition of those monarchies.
Dear royalcello,
"(2) The Wilson administration made the abolition of the German monarchy a condition of peace. The Allies made it very clear that they wanted the German and Austrian monarchies abolished."
This is one of the best pieces of empirical evidence against abolishing monarchies willy-nilly. What an assinine mistake this was.
sitetest
And after Austria declared war, Germany invaded Belgium, in accordance with a very detailed mobilization plan arranged long in advance. I'm glad to know that you are more loyal to Kaiser Wilhelm than your own nation, if indeed you are an American. A humanitarian intervention on the side of the allies was eminently justified, as it was in World War II. Germany was the clear aggressor and disruptor of the peace.