1st » The Royal Air Force is created by the merger of the Royal Flying Corps and the Royal Naval Air Service.
9th » World War I: The Battle of the Lys (1918) named Battle of the Lys the Portuguese Expeditionary Corps is crushed by the German forces during what is called the Spring Offensive on the Belgian region of Flanders.
9th » The National Council of Bessarabia proclaims Union of Bessarabia with Romania or union with the Kingdom of Romania.
20th » Manfred von Richthofen, aka The Red Baron, shoots down his 79th and 80th victims, his final victories before his death the following day.
21st » World War I: German Empire called German fighter ace Manfred von Richthofen, better known as "The Red Baron", is shot down and killed over Vaux-sur-Somme in French Third Republic e.g France.
23rd » World War I: The Royal Navy British Royal Navy makes a Zeebrugge Raid raid in an attempt to neutralise the Belgium Belgian port of Bruges-Zeebrugge.
24th » First tank-to-tank combat, at Villers-Bretonneux, France, when three British Mark IV tank called Mark IVs meet three Germany or German A7Vs.
Famous Birthdays on April in 1918
3rd » Mary Anderson (actress, born 1918) named Mary Anderson, American actress (d. 2014)
3rd » Louis Applebaum, Canadian composer and conductor (d. 2000)
4th » George Jellicoe, 2nd Earl Jellicoe, English soldier and politician (d. 2007)
6th » Alfredo Ovando Candía, Bolivian general and politician, 56th President of Bolivia (d. 1982)
6th » Big Walter Horton, American harmonica player (d. 1981)
7th » Bobby Doerr, American baseball player and coach
8th » Betty Ford, American wife of Gerald R. Ford, 40th First Lady of the United States (d. 2011)
8th » Glendon Swarthout, American author (d. 1992)
9th » Jørn Utzon, Danish architect, designed the Sydney Opera House (d. 2008)