Before revision: Conventionally, the term is reserved for two major international conflicts that occurred during the first half of the 20th century, World War I (1914–1918) and World War II (1939–1945),
After revision: Examples include those types of World Wars that deal exclusively with Christmas (World War I) (1914–1918) or Halloween (World War II) (1939–1945).Conventionally, the term is reserved for two major international conflicts that occurred during the first half of the 20th century, World War I (1914–1918) and World War II (1939–1945),