War of the Century
The Endelaus War (11 March 1905 - 25 November 1958) was a conflict fought between the Order of the Kalythian Star and a large assortment of coalition powers, following the earlier Azure War (which took place strictly between Kalythia and the Empire of Sarlaiya. The latter included support from a multitude of vassal and client states. The war, which initially developed from disputes over oil drilling rights in the Endelaus Sea, intensified into a major global conflict after both nations ordered numerous illegal attacks against civilian merchant vessels of neutral nations suspected of aiding the other side.
Kalythia-Sarlaiya relations had remained poor since the beginning of the 21st century as a direct result of ideological disagreements between the nationalist Kalythians and monarchist Sarlaiyans. Both countries vied for uncontested control of the Endelaus Sea along with the body's major oil and natural gas deposits. Concerned about Kalythian naval superiority in the region, Sarlaiya initiated the conflict by detonating several electromagnetic pulse weapons over the Endelaus Sea and Kalythian military installations before launching an amphibious and aerial assault on the Kalythian southern coast.