The Waltz

The waltz is a smooth and progressive ballroom and folk dance in triple time. During the late 19th and the early 20th century there were many different versions of the waltz in multiple different time signatures.

The Cross-Step waltz

The Cross-Step dance evolved in the early 20th century and was an extremely popular social ball dance. 

"It is characterized by a "primary cross step" where the Lead role crosses the right foot over the left, as the Follow role crosses the left foot over the right, on the first count of the musical measure"

The dance spread quickly as it was easy to learn for both inexperienced and experienced in dance. Both these versions of the waltz would've been around and popular during the 1910's and throughout the first world war