High Quality Content by WIKIPEDIA articles! The American Baptist Association (ABA), formed in 1924, is an association of nearly 2,000theologically conservative churches that are Landmark Baptist in their missions and teachings. The Association is based in the United States and has churches primarily in Arkansas, Louisiana, Texas, Mississippi, Oklahoma, Florida and California with smaller numbers of churches in almost all of the states. There are also numerous churches in Mexico, the Philippines and other foreign countries which affiliate with the ABA.