In Marea-Oriensian Left

In Marea-Oriensos Sinistram (Luthorian: In Tide - Oriensian Left) is a left-wing party in Oriensos, Selucia, resulting from the merger in 4098 of three labor unions to give support to the newcomer party In Marea to defy Factio Conservative. It is therefore the Oriensian referent of In Marea-Civis Sinistram.

Political ideology
Despite making less noise than their counterparts in Insularia, the party represents an important fishing ground for votes in the elections, and it is by far the one that maintains a more stable ideology. The party advocates for greater federalism, giving better powers to regional governments, but opposes the independence of the territory as contrary to the policies of the left in a democratic nation. Despite this, the party's leadership is generally aligned with the thinking of the party's leadership in Insularia, both federations being the promoters of the greatest changes in labor and social affairs.

History
Despite making less noise in the political landscape than In Marea-Insularia Sinistram, the party has consistently produced great electoral results since its inception.

Party organization
Since Aelius Promptus, all regional secretaries have served at least one term as Praetors of Oriensos, with only two of its secretaries missing the position.

General Secretaries

 * Vincere Collecti (4100-4131)
 * Quintinus Luccius (4131-4138)
 * Cocus Toutius (4138-4150)
 * Camilia Trogus (4150-4176)
 * Regulus Aductus (4176-4218)
 * Cario Opis (4218-4239)
 * Aelius Promptus (4239-4254)
 * Nike Domitia (4254-4273)
 * Alanus Turius (4273-4301)
 * Pristina Gallea (4301-4341)
 * Poshydon Taucratius (4341-4377)
 * Passilus Volantus (4377-4418)
 * Plinius Cauco (4418-4456)
 * Albus Rubio (4456-4490)
 * Ballio Priscus (4490-)

In Marea-Oriensos Sinistram in national politics

 * Percy Lacoonte: Caesar Senatus (4109-4115). 2nd General Secretary of In Marea-Civis Sinistram.