WW1 saw the introduction of a new invention, the flying machine. It was used for observation, but was eventually adapted for air warfare: one pilot threw a brick at another.
These are not technology related, but they are fun.
You could still buy heroine cough syrup in drugs stores with no prescription. Life expectancies were 48 for men and 51 for women. The Eiffel Tower was the tallest man made structure in the world. Antibiotics had not been discovered; you could die from a toothache. First Rose Bowl.....Washington State beat Brown.........Go Cougs. First PGA Championship. Wrigley Field opened. A Boeing aircraft flew for the first time. CocaCola brought its current recipe to market. The first supermarket opened in Memphis...............Piggly Wiggly. Workers Comp Act was passed. During the Battle of Somme, on September 15th at the Battle of Flers- Courcelette, the British debuted the use of tanks in war. John Rockefeller became the world's first billionaire. America's population was 1/3 of what it is today. The first woman was elected to the U.S.Congress by Montana voters. The first birth control clinic opened in NY. (Margaret Sanger) Federal spending $.7 billion. Stamp cost $.02. Albert Einstein completes his mathematical formulation of a general theory of relativity, which includes gravity.
Not Sure 