The trinity of corn, beans and squash was central to the agriculture of the Plains Indians in what would later become Wyoming, and some cooks honor that history each Thanksgiving with a dish called Three Sisters stew
This soup is very similar to Italian “Minestrone” soup. There may be some variations in ingredients, but “the basic plot” is the same. This is the way I have learned it in Dalmatia. It may be full meal because it is like stew. You may not include all ingredients I have mentioned; this is the “full house”.