Riverside plants clearly have wires attached to them and are moved by the wires to create a more natural scene. This is most apparent when Terry's friends are on the boat trying to reach Terry and tell him the news of the war's outbreak.
After the war was announced and Terry and his fellow Marines march off to war they sang a medley of songs that started off with, "You're in the Army Now". Can't imagine a U.S. Marine EVER singing this song.
The story takes place in 1917, but all of actress's fashions and hairstyles, as well as those of the other women in the cast, are strictly up-to-the minnute1931 modes.
During the opening shots of the film, as the camera scans across several Chinatown storefronts.