 The fairgrounds were annexed into Salem in 1921.The fair has been held every year on the same site, except in 1905, because the Lewis and Clark Centennial Exposition was taking place in Portland that year, and during the World War II years of 1943 and 1944; instead the fairgrounds were leased to military units as a place to bivouac.Also, although the 1942 fair was held, it was scaled back to only include 4-H displays, livestock exhibits, and displays from 27 Oregon counties, so it was not considered an official State Fair..