Hello There! The sections pictured in the catalog are part of a modular system to build earthwork fortifications from the 17th century to the late 19th century. These will work well for the Rev War range and the US Civil War range pictured in the catalog.
The corner section(17752) and the straight section (17838) are 'universal' sections. Four each of these two products would form a square earthwork for infantry.
The one pictured in the catalog used a different configuration including the 17758 set that includes the two US light infantryman and the British 17th Rgt of Foot casualty and three sets of 17757 which are half width sections and include the two US lights scrambling up the slope with the sapper, or pioneer, working at the defensive stakes at the base. This created an eartwork with a passage way to the rear.
Later this year we will be adding other sections that can be used with this system, including the platform necessary for artillery.
Hope this helps....Ken Osen