Rubuta ci gaba don wannan sakin layi - A cikin 19875, SPI ta buga "Blue and Gray", wasan farko na quadrigame <unk> yaƙe-yaƙe daban-daban guda huɗu ta amfani da dokoki iri ɗaya, an shirya su cikin akwati ɗaya. Yaƙe-yaƙe huɗu sun kasance "Shiloh
"Antietam", "Chickamauga", da kuma Cemetery Hill. Redmond A. Simonsen, Edward Curran, da Irad B. Hardy ne suka tsara waɗannan. Tunanin quadrigame ya zama sananne, kuma umarnin da aka riga aka yi ya sanya "Blue and Gray" SPI ta biyu mafi kyawun wasan sayar da wata kafin a buga shi. Da zarar an sake shi, ya kasance wasan SPI mafi kyawun siyarwa a watan Yuli da Agusta 1975.