20th century until World War II By the turn of the 20th century, Arcadia had a population nearing 500 and an economy that was coming to be based on entertainment, sporting, hospitality, and gambling opportunities, the latter including an early version of the Santa Anita race track. Baldwin oversaw the incorporation of Arcadia into a city in 1903, and was its first mayor.
20th century until world war ii by the turn of the 20th century arcadia had a population nearing 500 and an economy that was coming to be based on entertainment sporting hospitality and gambling opportunities the latter including an early version of the santa anita race track baldwin oversaw the incorporation of arcadia into a city in 1903 and was its first mayor