For the second year running, the G1 Epsom Derby winner was bred from one of Coolmore's countless Galileo (Ire) mares outcrossed to an American sire line. But whereas Sunday Silence's son Deep Impact (Jpn) gave Auguste Rodin (Ire) further turf genes from his mother's European family, City Of Troy's sire is a conduit for virtually unadulterated dirt blood. Justify's first four dams are, respectively, by grandsons of Deputy Minister, Seattle Slew, Northern Dancer and Bold Ruler. The third of those names, of course, transformed the European breed, albeit alongside other...