Vexillatioes of Legio XIII Gemina and Numerus Peditum Singularium Britannicianorum, both of which are documented by numerous brick stamps and inscriptions, are mentioned as the ancestral units of the fort Cigmău. Legio XIII Gemina had already taken part in the first Dacian war of Trajan and then moved into its headquarters in the legionary camp Apulum (modern Alba Iulia), from where it detached to various other locations. The Numerus Peditum Singularium Britannicianorum, which was first stationed in the province Moesia Superior, is documented from the year 110 in Dacia, where it probably remained until the end of the Roman occupation of the country. Possibly in the middle of the first century he replaced the troops of Legio XIII Gemina, which was detached to the province of Dalmatia around this time. The last epigraphic record of the numerus from Cigmău (as well as from Dacia) dates back to the year 245.