American doughboys in World War I called which ruler "Kaiser Bill"?

American astronomer Asaph Hall discovered which planet's two moons in 1877? "American Caesar" is a biography of which general, who told Congress "Old soldiers never die"? What was the middle name of American catalog merchant Aaron ___ Ward? Composer Robert Ward based a 1961 opera on which author's famous play "The Crucible"? American flags flew at half-mast when which Frenchman died in Paris on May 20, 1834? American forces crossed which river on Christmas night 1776 to surprise the Hessians? American forces won which January 1815 battle with help from pirates led by Jean Lafitte? General William Hull was court-martialed for surrendering which Michigan city during the War of 1812?