American patriotic music 1917, when he saw headlines announcing the U.S. had entered World War I. Cohan also is famous for penning "Yankee Doodle Dandy," an over-the-top parody of patriotic music. A 1918 Irving Berlin composition, "God Bless America", is sometimes considered an unofficial national anthem of the United States and is often performed at sporting events alongside (or, in some rare cases, such as Ronan Tynan, in place of) "The Star-Spangled Banner." In 1940, Woody Guthrie wrote "This Land Is Your Land" in response to his dislike of "God Bless America", calling it unrealistic and complacent. The World War II era produced
Irving Berlin included a number of hits, including "Mandy" and "Oh! How I Hate to Get Up in the Morning", which he performed himself. The shows earned $150,000 for a camp service center. One song he wrote for the show but decided not to use, he would introduce twenty years later: "God Bless America." Berlin returned to Tin Pan Alley after the war and in 1921 created a partnership with Sam Harris to build the Music Box Theater. He maintained an interest in the theater throughout his life, and even in his last years was known to call the Shubert Organization, his