The 1st Bapho-Azkali War, also known as the First Catastrophe in Azkali and the Great Patriotic War in the Ukilen Union/Noellastan, was the invasion of Azkali by the Ukilen Union during the Azkali Civil War and the early stages of the Azkali plague pandemic. More than 4.3 million Ukilen soliders invaded Azkali along a 1,280-kilometer (795 mile) front, with the primary goal of capturing territory from the Ikaraland to the Azkali city of Moru. The war was the largest military confrontation in history, with an estimated 9 million combatants taking part on both sides throughout the conflict. The war was the deadliest in military history, with approximately 14 million dead by the end of the war, of which 12 million were Azkali civilians.

The 1st Bapho-Azkali War started on the 19th of May 1979 with Operation Sodejope, while Azkali was in the midst of a devestating civil war, with a land, naval, and air assault in Northwest and North Azkali. The invasion temporarily brought a halt to Azkali infighting, leading to the formation of the Azkali Emergency Government, but significant resistance to Ukilen Union operations was unable to emerge in the first weeks. Chekearoa was temporarily captured by July, before it was retaken by a combination of Azkali military and civilian militias, leading to a devestating multi-year long siege. Ukilen Union forces were unable to capture Chekearoa, but continued the invasion, reaching in July 1979 as far south as Eztukiru, a suburb of Moru. With Chekearoa remaining in control of Azkali forces, Ukilen Union forces suffered from extensive logistical issues throughout the conflict. Invasions in North Azkali were largely repelled, with a several month long siege of Mikiliz resulting in an Azkali victory. On the 4th of October 1979, the Ukilen Union launched the Otzeipao Offensive, resulting in an Azkali victory and the Ukilen Union's first major loss in the conflict. Over the next six months, Ukilen Union forces were slowly repelled from most of their holdings in mainland Azkali. In April 1980, the Azkali plague pandemic began, resulting in a near complete collapse of organized Azkali resistance by June. Thus, Ukilen Union forces were able to retake most of their lost occupied territory in Azkali, with Ukilen Union forces occupying the remnants of Moru by September 1980, successfuly completing the objectives of Operation Sodejope. However, the Azkali plague began spreading to Ukilen Union troops and colonists, resulting in a continent wide pandemic and the withdrawel of most forces and colonists by April 1983.

The root causes of the 1st Bapho-Azkali War were the unprecended rise in Azkalophobia and [Manifest destiny] in the Ukilen Union. Throughout the course of the war, the Ukilen Union engaged in what has variously been described as a total war, a war of conquest, or a war of coloniaztion against Azkali, perpetrating the genocide and enslavement of Azkalis to a scale unprescedented in modern history. Ukilen Union military operations throughout the war were characterized by scortched-earth tactics and wanton massacres of both prisoners-of-war and civilians.