In Maine, like many other states, a newly formed Ku Klux Klan organization began recruiting members in the years just before the United States entered World War I. A message of patriotism and cautions about immigrants and non-Protestants drew many thousands of members into the secret organization in the early 1920s. By the end of the decade, the group was largely gone from Maine.
Concern about immigrants and their loyalty in the post World War I era led to programs to "Americanize" them -- an effort to help them learn English and otherwise adjust to life in the United States. Clara Soule ran one such program for the Portland Public Schools, hoping it would help the immigrants be accepted.
Yarmouth's "Third Falls" provided the perfect location for papermaking -- and, soon, for producing soda pulp for making paper. At the end of the 19th century and beginning of the 20th, Yarmouth was an international leader in soda pulp production.