Citizens All (1916)

"In this screen story is combined a touching plot with an amusing combination of whimsical characters, colored by the good old red, white and blue of its patriotic background."

Estranged after an argument, music teacher Johann Wagner and fencing master Henri Dupin attempt to separate their engaged children, Karl and Elsie. Seeking new quarters, they come to the same boarding house unbeknownst to each other. Thus reunited, Karl and Elsie determine to marry. Following the advice of their landlady Mrs. Flannigan they elope and are wed. The two old fathers remain at odds with each other and the couple until one day Mrs. Flannigan comes with the good news, a child has been born to the young house of Wagner. All is forgiven and reunited Grandfather Wagner and Grandfather Dupin leave arm in arm for the clerk's office to become US citizens.