What were America's strategies for fighting WWI?

When America started fighting WWI in 1917, the first thing that Wilson did was to list the nation as an "associate power," meaning that our overall goals would be to return the French-German border back to its 1914 level and to restore Belgian sovereignty.  Wilson put our soldiers in command of an American, Jack Pershing, and made sure that they would operate as the American Expeditionary Force, not trench fill-ins.  The American soldier participated heavily in the summer and fall offensive of 1918, often charging headlong into German machine gun nests at Bealleau Wood and Chateau-Tierry.  French and British soldiers who had been in the trenches sent late 1914 marveled at how readily the soldiers attacked.  They were much more aggressive than their British and French counterparts.  

In terms of naval affairs, America began to give yet more supplies to the Allies in terms of munitions and loans.  America also used the convoy system to control the German U-boat menace that had been an intermittent threat since its unveiling in 1914.