Operation Jonah
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| Operation Jonah | |||||||
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| Part of the Final War of the Deluge | |||||||
.jpg) Royal Marine Corps landing reinforcements on West Seneca, 2 January 2022 | |||||||
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| Belligerents | |||||||
 Urcea Alstin |
 Algoquona | ||||||
| Units involved | |||||||
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Royal and Imperial Army Royal Navy Royal Marine Corps United Republic Navy |
Seneca Islands Garrison Navy of Varshan | ||||||
| Strength | |||||||
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125,000+ (initial) 300,000+ (March 2022) | 130,000+ | ||||||
| Casualties and losses | |||||||
| High | High | ||||||
The Operation Jonah was the Urcean invasion of the Seneca Islands during the Final War of the Deluge. The Seneca Islands, a critical commercial and shipbuilding territory for Varshan, were the only major remaining target to ensure the full naval blockade of Varshan. The Islands, which are strategically located just off the shore of mainland Varshan, also provided allied forces a convenient target to relieve pressure from Varshani operations elsewhere, including the ongoing occupation of Cetsencalia, Quetzenkel front, and other parts of the Final War of the Deluge. The campaign featured the first wartime use of an atomic bomb since the Great War.
Background
Through November 2021, allied forces in the Final War of the Deluge - especially Urcea and its Nysdra Sea Treaty Association partners - had been unable to make significant progress against Varshani territory itself. Varshan, on the other hand, had managed to successfully invade Cetsencalia and were making progress in their war with Corumm. Allied planning dictated that a major operation against Varshan was necessary to relieve pressure on other fronts. Operation Jonah was designed in order to take advantage of the allies' clear naval supremacy in the war and was originally envisioned as an amphibious attack against mainland Varshan, which was eventually ruled out due to the objections of the Royal Navy. The strategically valuable Seneca Islands, on the other hand, presented numerous advantages. Varshan would be quick to reinforce the islands due to its proximity to the Varshani coast where the could be easily trapped by allied naval action. Additionally, several new shipbuilding facilities and other commercial ports had been constructed on the islands during the early 2000s as an effort by Varshan to prepare against The Deluge. Consequently, it could be easily reinforced and used as a forward base for further operations against the mainland at a future point in the war. Allied leaders agreed to the Seneca Islands as the target in early November and operational planning began immediately.