If you check out the Zimmerman Telegram you will also find out the ‘real’ reason behind our entry into the war. Germany was conspiring with Mexico (we had just fought them) to try to get them and Japan to attack us. It was causus beli for war. But we couldn't say the REAL reason, because it would reveal that the British had broken the German code.
We had damn good reasons to enter the war.
The problem was the Treaty of Versailles that imposed a ‘peace’ on Germany that was tantamount to economic slavery in perpetuity. Germany had to get out of the ‘peace’ treaty, even if it had to fight the entire world to do it. Hitler capitalized upon this historic reality to catapult himself into power.
“Germany was conspiring with Mexico and Japan to get them to attack us”
Pardon me, but Japan was at war with Germany by 1915.
The English had promised them the German and Austrian properties in China for attacking them.
Americans tend to know about the Western Front in WWI, but know nothing about the Eastern Front or the Austria-Italy Front. Due to the movies, people will know a bit about the fight against the Turks via ‘Lawrence of Arabia’ and ‘Gallipoli’.
By 'our', do you mean British?
The sinking of the Lusitania
How shocking - a ship, carrying the flag of a belligerent, transporting arms, was sunk in an exclusion zone.