Mezue ahịrịokwu na-esonụ: N'afọ 1987, SPI bipụtara "Blue and Gray", egwuregwu quadrigame mbụ ya <unk> agha anọ dị iche iche na-eji otu usoro iwu, dị n'ime otu igbe. Agha anọ ahụ bụ "
Shiloh", "Antietam", "Chickamauga", na Ugwu Ili Ozu. Ọ bụ Redmond A. Simonsen, Edward Curran, na Irad B. Hardy rụrụ ha. Echiche nke quadrigame gosipụtara na ọ na-ewu ewu, na ntinye akwụkwọ tupu oge emee "Blue and Gray" nke abụọ nke egwuregwu SPI kachasị mma n'ọnwa tupu e bipụta ya. Ozugbo a tọhapụrụ ya, ọ bụ egwuregwu SPI kachasị ere ahịa na July na August 1975.