Roman military diplomas are legal documents (constitutio), which were inscripted on two bronze plates. They were issued to the retired soldiers who spent proper amount of time in the Roman army and were honorably discharged. These constitutions were issued from about the middle of the 1st century until the beginning of late antiquity. With them the members of the peregrines gained Roman civil rights and the right to enter into legal marriage. Roman military diplomas contain a certain number of data which are related to the emperor, the army, consuls, recipients, etc. So far, five Roman military diplomas have been found in the Vukovar- Srijem county. Two are from Sotin ( Cornacum), following one copy form Ilača, Negoslavci and Vukovar. Two of them were issued during the reigns of Nero. They were assigned to the ex- soldiers originating from the southern Pannonian community of Breuks. The following two diplomas are issued by the emperor Antoninus Pius and assigned to a Dalmatian and soldier who was originally from Anazarb in Clicia. The last diploma is unfortunately lost, so we do not know more information about it.