Are the names of historic events treated as proper nouns?

Solution 1:

When specifying certain historical eras, or historical periods, and when referring to specific historical events, they should be capitalized as proper nouns. Doing this differentiates these titles or names from the common words within them.

For example:

  1. Roaring Twenties
  2. McCarthy Era
  3. Cold War
  4. Bronze Age
  5. Great Depression