After which April 1775 battles did John Adams say "the die was cast, the Rubicon passed"?

After they invaded China and captured Beijing in 1644, which people established the Qing dynasty? After which 1906 disaster did Mayor Eugene Schmitz authorize the shooting of looters? After which 1968 communist offensive did Walter Cronkite tell Americans the Vietnam War looked unwinnable? In the 1994 film "Wolf", which actor, after being bitten, marks his territory by urinating on James Spader's shoes? In the 1981 film "Raiders of the Lost Ark", which archaeologist outruns a giant boulder, only to have rival Belloq stea… After which British poet drowned off Italy in 1822 did his friend E.J. Trelawny snatch his heart from the funeral pyre? After an October 1964 appearance, Ed Sullivan vowed which British band would never be back on his show, though it retur… After which city fell on April 2-3, 1865 did Union troops raise the U.S. flag over the Confederate capitol?