Upper Basin War

Belligerents|  **Kanorian Empire**Wilter & Levi Co.Rasvetla SlobiaKingdom of Eldcyning**Supported by:**Fulcrum* Socialist Republic of John
* Federal Kingdom of Polmaria

Coalition of the Steel Lance | **Northern Coalition*** Valeronian Federation
* Republic of Gresia

Republic of Frezebue**Supported by:**Askalis Concordance* Republic of Ospalar
* Sultanate of Kherfiyyah

The **Upper Basin War**, more simply called the **Kanorian invasion of Valeron**, was a military operation that unfolded in 1954. It began when the forces of the Kanorian Empire, at the direction of Osea I, attacked Valeron in the Surprise Offensive.

## Background

Imperial Kanorian Army units mobilized in the spring of 1954. An elaborate military deception was employed by the Kanorian government, with aid from the Fulcrum, that suggested Osea I's mass mobilization was aimed at the Astavaran Peoples' Republic rather than Valeron. Roughly 247,315 Valeronian military personnel – representing more than sixty percent of the nation's active armed forces – were training on Fish Island ("Objective Piscula") as part of a unifying exercise ordered by Lady High Sentinel Eris Durash.

Kanorian representatives met with diplomats from the Inter-Continental Security League, dominated by Wilter & Levi Co., and managed to secure military support from the group after pursuing a policy of strategic ambiguity with regard to their international affiliation post-war. Throughout the invasion, Kanoria straddled the influence of both the Fulcrum and I-CSL.

The Kingdom of Eldycning, already undergoing political "Kanorianization", agreed to subordinate its military forces to the Imperial Kanorian Army for the duration of the Upper Basin War.

## Timeline

### Surprise Offensive of 1954

*Main article: Order of battle of the Upper Basin War, Surprise Offensive, First Battle of Valeris, Battle of the Featherwood, Battle of Stolander Base, Capture of Greyshell*

The war commenced with a sweeping Kanorian invasion through the eastern frontiers of Valeron.

A heavy incursion toward the capital city of Valeris by the Kanorian 3rd Corps was quickly repulsed, largely due to the Valeronians' belt of underground military fortifications, which allowed them to inflict severe attrition on the invaders, even without reinforcement.

Echeloned attacks toward the industrial city of Greyshell ("Objective Griseota"), overseen by supreme commander-in-chief Clemens Menger of the 1st Corps, achieved remarkable success, destroying two Valeronian army units, capturing the towns of Valuana, Bellata, and Blackcliff, as well as occupying a Northern Coalition base housing troops from the Republic of Gresia. Soon after this, the Valeronian army at Greyshell surrendered, and the city became the invaders' forward operating base for the duration of the campaign.

By this time, the High Lady Sentinel of Valeron had called back the bulk of her forces from Fish Island, ordering a combination of amphibious landings against Kanorian-controlled areas as well as conventional counterattacks along the front.

## References

1. ↑ The Valeronian military went through several structural evolutions throughout its existence to eliminate internal factionalism based on tribal affiliation.