Hitman079 wrote:if pearl harbor never happened, then america wouldn't have joined in World War II.
same goes for the sinking of the Lusitania.
Not sure about either of those statements. The US government and military were gearing up for war well before Pearl Harbour, this really just acted as a catalyst to turn public opinion away from their isolationists views.
As for WW1 it was almost the opposite. The government were strongly against the war while the people were mainly for an intervention. The governments view changed as they realised there was a possibility of Mexico entering on Germany's side, bringing the war to their continent. The sinking of the Lusitania just gave the government a casus belli to enter the war. I'm sure this could have been written off as a diplomatic incident rather than a declaration of war if it didn't suit the US governments foreign policy.