The Lex Plautia Papiria de Civitate Sociis Danda was a Roman plebiscite enacted amidst the Social War in 89 BCE.
In 90 BCE, the Lex Calpurnia gave commanders the power to reward valor of soldiers with Roman citizenship.
In the same year, the Lex Julia de Civitate Latinis et Socii Danda granted civitas to Italian communities who had not participated in the rebellion against Rome to prevent them from joining the war.
The law stated that communities with newly granted citizenship should be enrolled in new tribes for voting in the Comitia Tributa.
In the same year, the Lex Pompeia de Transpadanis granted Latin rights to the communities in Transpadana, the region north of the River Po as a reward for having sided with Rome during the war.