The First Whirlpool Cold War was a cold war that happened between the Shadow War and The First Galactic War.
The Cold War was mainly between the Galactic Republic of Tretris and the Oltanian Empire. It lasted for 35 years and was considered one of the most active Cold Wars in the galactic history.

Starting the Cold War was the Shadow War, a brutal campaign orchestrated by the Oltanian Empire after their re-emergence in the Whirlpool Galaxy around 135 of 2779 GRS. The Shadow War was a year long war that crippled the Republic of Tretris to the point of collapse, it was considered one of the most deadliest attacks ever done by the Oltanian Empire, however what made the Shadow War so deadly and so cost worthy was the economic impact it did on the galaxy. The Republic was in turmoil for the first 3 years after the Shadow War. Refugees escaping the Northern Republic Territory which was recently given to the Oltanian Empire as part of the Treaty of Tretris Oakutarui, and refugees coming from war torn worlds caused by the war. In the Capital which was hit the hardest in the conclusion of the War, many sectors were abandoned due to the extensive damage from the Oltanian Bombardment this weakened the infrastructure of the cities of the planet. With sections of the city abandoned this lead to many more refugees flocking to them just to find shelter. Out of this black markets began to spring up in these sections and began to hold them down so Republic and Shanksville Police can't regain control.

Meanwhile other worlds were given the back end of the Treaty some saw reparations to the Oltanian Empire and its newly gained territory in the Whirlpool Galaxy. Many worlds like Arrogosii V and the Twin Systems saw that the Republic simply surrendered to the Oltanian Empire, this caused uprisings in their worlds. In the Twin Systems the Royal Line was executed by Demitri Allandar and his followers and declared themselves the ruler of the Twin Systems. As part of their new rule they seceded from the Republic to remain independent so they won't have to pay the reparations stated in the Treaty. Other worlds like Arrogosii V seceded as well from the Republic not because of their hatred from the Core Worlds, but more of their position from the war. The Arrogosiian Council predicted the war and the Republic's surrender they knew the Republic was going to fall but instead of paying reparations along with the rest of the Republic the Arrogosiian Council seceded from the Republic and defend themselves. Many more worlds seceded from the Republic following after the Treaty of Tretris Oakutarui this severely crippled the Republic.

Meanwhile on the Oltanian side, the Otlanians were celebrating their victory over the Republic, however Vernindad Jessop didn't want to revel in the victory. He prepared the Empire for the upcoming war, the war that will completely wipe the Republic. However they needed to defeat the rebellions in the Northern Republic Territory. Many worlds didn't like they were given to the Empire, this stretched the Fleet due to many outbreaks of rebellion throughout the Northern Republic Territory. The most known rebellion was the Koruscian Rebellion. The Koruscians of the planet Korus were outraged that they were given away to the Oltanian Empire, so they set off attacks across their former empire to show the Oltanians they meant business. At first Jessop ordered those that resisted to be enslaved, and if they continued to be executed. However he was holding the Republic's major shipyard makers so executions were hard to give. For nearly 5 years the Koruscian Rebellions continued to the point the Vernindad gave the planet Korus back to the Republic under an agreement to end the Rebellions. This gesture soon ended the Rebellions only for Korus however the other planets continued to rebel. However with Korus now back under the Republic those escaping the enslavement process came to Korus to hide. At the same time this meant the Republic can rebuild their fleet again without the Oltanians spying on them.

In the end, the Cold War between the two superpowers continued till the First Galactic War when the Oltanians attacked the Republic Capital. However the Cold War left an impact on the Galaxy, as the galaxy recovered so did those affected by the War, many territories saw this action and prepared for an Oltanian Invasion even though the Oltanians were only after the Republic, many worlds in bordering the Republic were affected by the Oltanian attack. The impact of paranoia of another invasion from the Oltanians remained alive in the minds of the Republic citizens, they knew the Oltanians were going to finish their attack on the Republic and whether it be today or tomorrow the fear of another invasion, losing everything they have was up in the air.