You could also probably get away with making up some up as well. Maybe he earned the Winged Saber, for leading a boarding party that reclaimed an imperial ship from the Orks, or the Preserver's Ribbon, given to him by representatives of the Adeptus Mechanicus for valiantly fighting back an onboard fire that threatened a bank of centuries old cogniator units. Perhaps he earned the coveted Iron Chain for his part in putting down a mutiny.