This was pre-code Hollywood, and pre-brassiere days.

There are scenes with passionate kissing deemed risque back then.

For a PG rated film it's pretty violent. Since it's a war movie, there will be violence.

A man gets shot in the arm during a duel, he survives

A man gets slapped

The final dogfight is pretty intense.

A pilot gets shot in his plane. When we see his face, lots of blood is coming out of his mouth.

Another pilot gets shot in his plane, he then screams loudly in pain.

A man is stuck in a plane that is on fire

A man gets shot

There are two executions. We can see one of the people getting shot and killed, however, the other execution takes place off-screen, the shot can be heard.

Some adult language

Few uses of "hell", one use of "ass", a use of "bloody", a use of "son of a bitch", and a use of "for Christ's sake" and one use of "Goddamn it"

Some mild insults, including "shut up"

Language like this was never used in 1930 movies before, until this movie came out.

In the beginning of the film, there is a festival taking place. People are drinking beer and alcohol.

There are many scenes with people smoking

In a bar again, some people are seen drunk.