The situation led in 91 BC to the outbreak of a devastating war, in which the Samnites and the Marsi led a revolt against Roman rule for four years. Most of the Etruscans, Umbrians and Latins did not join the rebellion. In order to avoid a future conflict of the same kind, Rome decreed a series of laws (Lex Iulia in 90 BC, Lex Plautia Papiria in 89 BC) by which the peoples and cities who remained loyal or surrendered were awarded Roman citizenship. By 87 BC, Roman victory was complete and citizenship extended to all of peninsular Italy.