Films About Era - the following is a list of movies about the time periods covered in US History. These films are all rated G, PG, or PG-13. Certainly there are examples of movies about these eras that are rated R (especially war movies), but you will not find them here.
One final note - this is an ongoing list. I will occasionally add to this list. If you have suggestions, please let me know!
Gilded Age/Industrialization
Matewan (1987)
Modern Times (1936)
World War I
All Quiet on the Western Front (1930)
Sergeant York (1940)
Paths of Glory (1957)
Lawrence of Arabia (1962)
War Horse (2011)
1920s
Singin' in the Rain (1952)
The Artist (2011)
The Great Gatsby (2013)
Great Depression
The Grapes of Wrath (1940)
To Kill a Mockingbird (1962)
Seabiscuit (2003)
Cinderella Man (2005)
WWII
The Great Dictator (1940)
Casablanca (1942)
Thirty Seconds Over Tokyo (1944)
The Bridge on the River Kwai (1957)
Judgment at Nuremberg (1961)
The Great Escape (1963)
Tora! Tora! Tora! (1970)
Cold War
High Noon (1952) - HUAC/McCarthyism allegory
The Manchurian Candidate (1962)
Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb (1964)
October Sky (1999)
Thirteen Days (2000)
The Fog of War (2003)
Good Night, and Good Luck (2005)
One final note - this is an ongoing list. I will occasionally add to this list. If you have suggestions, please let me know!
Gilded Age/Industrialization
Matewan (1987)
Modern Times (1936)
World War I
All Quiet on the Western Front (1930)
Sergeant York (1940)
Paths of Glory (1957)
Lawrence of Arabia (1962)
War Horse (2011)
1920s
Singin' in the Rain (1952)
The Artist (2011)
The Great Gatsby (2013)
Great Depression
The Grapes of Wrath (1940)
To Kill a Mockingbird (1962)
Seabiscuit (2003)
Cinderella Man (2005)
WWII
The Great Dictator (1940)
Casablanca (1942)
Thirty Seconds Over Tokyo (1944)
The Bridge on the River Kwai (1957)
Judgment at Nuremberg (1961)
The Great Escape (1963)
Tora! Tora! Tora! (1970)
Cold War
High Noon (1952) - HUAC/McCarthyism allegory
The Manchurian Candidate (1962)
Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb (1964)
October Sky (1999)
Thirteen Days (2000)
The Fog of War (2003)
Good Night, and Good Luck (2005)