Whatever the academic textbooks and Wikipedia tell you, creative and satiric photomontage began before Dada. It was a grassroots and folksy and anonymous thing, and its postcards went far and wide. Here’s such a doctored postcard sent 1915, and it was probably pasted up sometime in the early 1910s.
It pokes fun at the reputation the decaying Newburyport in New England. Which would later be H.P. Lovecraft’s inspiration for Innsmouth. The card’s fun-poking implies that, in Lovecraft’s time, the town already had a certain reputation which the postcard-maker expected would be recognised throughout the region.