 Sladden noted that from 1904 to 1908, the number of Socialist Party Locals in Oregon had grown from 32 to 74, despite a lack of full-time party organizers.The years 1910 through 1912 marked a high-water mark of sorts for the Socialist Party of Oregon in terms of its size and influence.The organization conducted an impressive demonstration in the afternoon of May Day 1910, in which 1500 members and supporters of the party, decked out in red ribbons and carrying red banners, marched through the streets of Portland.