Abstract: A bridge to construct a multi-stage wall is provided with a clip at each end. One of the clips is sized and shaped to fit snugly onto the wall of a standard concrete masonry unit (CMU), while the other is sized and shaped to fit onto a segmental wall system (SWS) unit. A retaining or stand-alone wall is constructed by laying a row of SWS units and a row of CMUs roughly parallel to each other, with bridges extending between them to fix the units. The hollow spaces in each unit and the space between the rows is filled with gravel, rock or other fill material as each course is laid. Additional courses of SWS units and CMUs are placed on top of the prior courses, with bridges added to each course. This process is repeated until the desired wall height is reached. Various sized and shaped clips and connector brackets are provided to allow spacing of the walls at different distances, with varying blocks.