Franklin Delano Roosevelt, an adult victim of polio, founds the National Foundation for Infantile Paralysis, which he later renamed the March of Dimes Foundation, on January 3, 1938. A predominantly childhood disease in the early 20th century, polio wreaked havoc among American children every summer.

On January 16, 1938, swing jazz music has its high-brow coming out party at Carnegie Hall, with a concert featuring big band sensation Benny Goodman.

“See for yourself what the genius of Walt Disney has created in his first full length feature production,” proclaimed the original trailer for Snow White and the Seven Dwarfs, released on February 4, 1938.

On February 12, 1938, best-selling author Judy Blume, known for her children’s books and young-adult novels, including Tales of a Fourth Grade Nothing and Are You There God? It’s Me, Margaret, is born in Elizabeth, New Jersey. Blume’s books have been beloved by several generations of readers; however, the explicit subject matter of some of her novels for adolescents has made them a target for censors.

The National Dollar Stores Strike begins in San Francisco's Chinatown on February 26, 1938. The three-month strike delivered a win for workers and became the neighborhood's first major organized labor dispute.

On March 12, 1938, German troops march into Austria to annex the German-speaking nation for the Third Reich.

Douglas Corrigan, the last of the early glory-seeking fliers, takes off from Floyd Bennett field in Brooklyn, New York, on a flight that would finally win him a place in aviation history.

Without warning, a powerful Category 3 hurricane slams into Long Island and southern New England, causing 600 deaths and devastating coastal cities and towns. Also called the Long Island Express, the Great New England Hurricane of 1938 was the most destructive storm to strike the region in the 20th century.

On September 27, 1938, President Franklin Roosevelt writes to German Chancellor Adolf Hitler regarding the threat of war in Europe. The German chancellor had been threatening to invade the Sudetenland of Czechoslovakia and, in the letter, his second to Hitler in as many days, Roosevelt reiterated the need to find a peaceful resolution to the issue.

British and French prime ministers Neville Chamberlain and Edouard Daladier sign the Munich Pact with Nazi leader Adolf Hitler. The agreement averted the outbreak of war but gave Czechoslovakia away to German conquest.

“The War of the Worlds”—Orson Welles's realistic radio dramatization of a Martian invasion of Earth—is broadcast on the radio on October 30, 1938.

On November 9, 1938, in an event that would foreshadow the Holocaust, German Nazis launch a campaign of terror against Jewish people and their homes and businesses in Germany and Austria. The violence, which continued through November 10 and was later dubbed “Kristallnacht,” or “Night of Broken Glass,” after the countless smashed windows of Jewish-owned establishments, left approximately 100 Jews dead, 7,500 Jewish businesses damaged and hundreds of synagogues, homes, schools and graveyards vandalized. An estimated 30,000 Jewish men were arrested, many of whom were then sent to concentration camps for several months; they were released when they promised to leave Germany. Kristallnacht represented a dramatic escalation of the campaign started by Adolf Hitler in 1933 when he became chancellor to purge Germany of its Jewish population.

On December 16, 1938, Adolf Hitler institutes the Mother’s Cross, to encourage women of "pure" German origin to increase the size of their families and grow the population of the Third Reich.

On December 28, 1938, the silent-film star Florence Lawrence dies by suicide in Beverly Hills. She was 52 years old. Though she was best known for her roles in nearly 250 films, Lawrence was also an inventor: She designed the first “auto signaling arm,” a mechanical turn signal, along with the first mechanical brake signal. She did not patent these inventions, however, and as a result she received no credit for—or profit from—either one.