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The Maneiran geographical region is a fertile landmass located in the Sarkis region of north Orientalist, bordering the Saga region to its west and the Pangasinese geographical region to its east, with dry wind flowing from Unistan, cold winds from Yastreovakia, and humid wind from the Oriental interior. All of these combined meteorological factors combined with its hilly and river-ridden geography makes the Maneiran region an ideal location to form complex agricultural societies during the late stone age. The Trenggalu river is one such location where the Maneiran civilization began.

(W.I.P)

The bas relief on the Candi Trenggalu temple complex depicts a King sitting in the king's posture pose surrounded by a Queen and his subjects, the scene is based on the Tarumalendra royal court.

The first significant maritime power of the period is the Gentaram kingdom which exists from the mid 3rd to approximately late 4th century CE and is notably ruled by the Tarumalendra dynasty. The Gentaram kingdom is the region's largest thalassocracy at the time, and during their apex of power controlled a significant amount of the region's maritime trade. The kingdom holds significant commercial ties with the Iloko empire, proven by the existance of Iloko potteries and jewelry found in the remnants of Gentaram palaces and houses, with the same being true for the Iloko.

The kingdom is ruled by a maharaja and is organized as a thalassocracy under a mandala system, of which it only directly administer the territory of their capital and immediate neighboring settlements while controlling farther territories indirectly as vassals, this system of governance would later be commonplace in the succeeding centuries. Gentaram's territory spans from modern day Bondang in east Maneiras to Ganha, holding suzerainty over much of interior Maneiras such as the Mandana and Surantawi kingdom, and coastal Sarkis and Saga. Fractured remains of Gentaram potteries and jewelry have been found in the Formosans, Qingtou and even Chi-Mun, indicating extensive trading relations with ancient Oriental powers.

The kingdom holds significant maritime power in north Orientalis and have waged wars against regional powers for naval supremacy with the Ilokos and other neighbouring kingdoms, the former being speculation due to the presence of shattered ship remains belonging to both empires found inbetween the two kingdom in close proximity. Scattered records in the form of stone inscriptions found in the ruins of the coastal port city of Lejong, east of Bandar Perak, recalls the event where a Gentaram armada consisting of a hundred ships obliterated the Lejongese fleet, forcing the port city to accept Gentaram monopoly over north Oriental trade.

Besides its success in the early Manahirist period, Gentaram is also known for their grand architectural projects, where approximately 1,093 temples were built during the existance of the kingdom, ranging from small redbrick temples for village level worships, to enormous world renowned temples which still stood to this day, one of which being the Candi Trenggalu which is still the largest temple to be constructed in the northern hemisphere. The Candi Trenggalu contains reliefs and numerous stone inscriptions which detailed a variety of Gentaram history, their kings, nobilities, and even pieces of coin, all pointing to the kingdom's sophistication which may have been on par with ancient Zhouian and Liaozhuan civilization in east and southeast Orientalist.

Historical records from the era stopped mentioning the existance of Gentaram after the late 4th century, indicating Gentaram's disappearance to also be around that time period. However, later records from the late mid Manahirist era of the Pangkuwijaya empire would reveal that the Tarumalendra dynasty and by extension Gentaram still existed after the 4th century, with the Tarumalendra becoming the ruling dynasty of Pangkuwijaya. It is suspected that the Tarumalendra intermarried with early Pangkuwijayan royalty before replacing them as the ruling dynasty, splitting the dynasty in the process, of which the Gentaram Tarumalendra dynasty would be conquered by Pangkuwijaya approximately in the mid 5th century.

Candi Muara Senå, the largest temple to have originated from the early Manahirist period and largest redbrick temple in Maneiras.

A longtime rival of the Gentaram kingdom and later its successor, the Pangkuwijayan empire is one of the largest empire in the region's history, and is the largest thalassocratic empire to exist during the early Manahirist period, in addition to being the largest non-Maneirese kingdom to exist at the time. Pangkuwijaya is recorded to be a vassal of the former Gentaram kingdom of which the Pangkuwijayan royal family would intermarry with Gentaram's Tarumalendra dynasty. Pangkuwijaya is founded in the early 5th century only decades prior to the fall of the Gentaram kingdom and is suspected to be the primary reason for its downfall.

Its heartlands situated in Ganha, the early Pangkuwijayan empire originates as a tributary state formed by Gentaram to more efficiently administer the western portion of the kingdom, being ruled by the family of a Gentaram minister which would become Pangkuwijaya's first ruling royal family, the Batawi dynasty. During the later part of the 4th century, the Pangkuwijayan royal family would steadily intermarry with the Tarumalendra dynasty, suspected to be a power play of the empire's second maharaja, Sri Mitrekabhuwana, in his attempt to undermine his own dynasty — where the first maharaja of the empire is said to be indecisive and inept by his own description — and instill the legitimacy of the Tarumalendra to strengthen the empire's own share of regional trade.

During the early part of the 5th century, the Batawi dynasty have no longer been the dominant dynasty of the empire and is replaced by the eastern Tarumalendra dynasty, splitting the Tarumalendra dynasty into an eastern and western portion. During this time, the fourth maharaja Sri Rakshabaduga expanded the reach of Pangkuwijaya to encompass much of the eastern Maneiran periphery and Saga coast, where Pangkuwijaya entered an early period of what would be known as its golden age. During Rakshabaduga's reign, the empire would outshine the Gentaram kingdom in its mercantile and diplomatic reach, where Pangkuwijaya would attain or outright stole Gentaram's vassals by ways of hostile takeover or invasion. Gentaram's inaction to Pangkuwijayan incursion into their sphere is said to be the result of the kingdom's stagnation and political instability, of which it had lost a significant portion of its treasury and military to peasant revolts.

Poor harvests and political chaos would plunge the Gentaram kingdom into a dark age of which is exploitated by Pangkuwijaya, where the empire invades the kingdom and seized its capital, decapitating the kingdom and forcing the western Tarumalendra dynasty to flee west where it would establish a shortlived interim government called Kahuripan, a government which would be absorbed into Pangkuwijaya a decade later, marking the end of Gentaram, and beginning the Pangkuwijayan golden age and regional hegemony.

The Pangkuwijayan empire during the reign of its sixth maharaja Sri Bimasakatwang reached its territorial apex, extending from modern day southwestern Pangasinan to the Sagan eastern coast. The empire rivaled the Iloko empire to such an extend to brew a longstanding cold war which historians suspect to culminate in a short but bloody conflict dominated by naval warfare in the early 7th century, of which neither side achieved significant gain. The empire's diplomatic reach during this time extends from northern Orientalist to the Formosans, Qingtou, Chi-mun, and Hayotoro, with records believing the empire to have a trading relation with Unistani merchants. Manahirist arts and architecture would flourish during the Pangkuwijayan golden age and the art of Batik would became prominent during this era. The Pangkuwijayan imperial script would later be the foundation for the Maneirese and Surantanese script, and Pangkuwijayan imperial architecture would later be copied by succeeding empires and be commonplace throughout the Maneiran periphery. Islam would also make itself known during this era, though its presence is limited to port cities such as the imperial capital, Ganha Tua.

During the late 7th to mid 8th century, historical records have generally agreed that the empire entered a period of stagnation where expansion efforts during that era failed due to the significant pushbacks of local Sagan and Qingtouan powers. The emergence of rivaling dynasties during this period would have disastrous consequence for the empire as Tarumalendra's dominance over imperial politics would slip into the hands of rival families, with imperial control over its vassals and inland settlements diminishing from the Tarumalendra's shift in attention to curtailing the power of rival families. Due to this, when a Sagan vassal, Galumandala, declared its independence from Pangkuwijaya, the empire failed to form a coherent task force due to political infighting which led to the disastrous Galumandalan war which crippled the empire's military and drained it of its previously abundant treasury.

Political infighting and treasury depletion would cast the empire into a dire political crisis which culminated in the late 9th century with the empire's implosion, shattering it into six different kingdoms, and shattering its regional dominance, practically deleting the region's largest mandala. The period of constant warfare and unending bloodshed would later be called the Warring States period which lasts centuries into the late Manahirist period.