When did WW1 and WW2 became known as 'World Wars'? WW1 was known as the Great War and the time and there have been many global wars that happened before

by RoyalN5

lord_mayor_of_reddit

While more can always be written, you may be interested in this previous answer of mine which addresses both parts of your question.

This sub's FAQ also has a shorter answer of mine which addresses the first question alone.