Mexico–Kingdom of Sierra relations
 Mexico |
 Sierra |
|---|---|
| Diplomatic mission | |
| Embassy of Mexico, Porciúncula | Embassy of Sierra, Mexico City |
| Envoy | |
| Mexican Representative Manuel Capote | Special Representative James Howard Moore |
Mexico and the Kingdom of Sierra have no active bilateral relations since 2017 after Mexican president Pablo Hidalgo de Veracruz formally severed ties as a result of the revival of the El Norte dispute. Relations between Mexico and Sierra have been defined by a long and complicated history ranging from open hostility and antagonism to formal trade and stable coexistence. Relations between the two countries would be formally established in 1858 after the kingdom was established and succeeded the California Republic which emerged after the Mexican–American War of the 1840s.
Trade would be established in the 1860s and continued throughout the period, however many in Mexico were angered over El Norte, a region in the nothern territories of Mexico ceased to California after the war, remained under Sierran jurisdiction and administration. Santa Anna would still recognize Sierran claims over El Norte due to Mexico lacking the military capabilities to seize the territories by force and lakced the desire to do so, but irredentism would remain a focal point in Mexican politics regardless. During the Second French intervention in Mexico, Sierra would remain neutral in the conflict and would ultimately recognize the Second Mexican Empire upon its establishment which would pursue friendly relations with Sierra. North Mexico recieved significant backing from Sierra and other nations in Anglo-America.
During the Mexican Civil War, Sierra sided and intervened on behalf of several revolutionary factions and governments, eventually being drawn into a proxy conflict with the United Commonwealth in the process, and ended the war by partitioning Mexico between the pro-Sierra North Mexico and the pro-Continental South Mexico. During the Great War, Mexico was reunified through a series of armed conflicts and diplomatic moves collectively known as the Second Mexican Revolution, ending with establishment of a socialist government in 1933 and Mexico would fight against Sierra as part of the Landonist International and was the site of major fighting during the Mexican campaign in 1935 and 1936 before withdrawing from the war in early 1938 all together. During the Cold War, Mexico was part of the Eastern Bloc and was briefly under a de-facto one party state in the 1940s before multi-party elections were held in 1950 that ended the system, but kept Mexico aligned with the United Commonwealth during this period.
Following the Revolutions of 2000, the Mexican and Sierran governments would engage in efforts to re-establish positive and friendly relations out of a sense of pragmatism and commitment towards peace for the peoples of both nations now that the Cold War was over. Progress would be made, but issues arose in 2008 over the revelation of drug cartels wielding political influence and several of them having ties to Mexican president Veracruz. Starting in 2012, the El Norte dispute was revived and negations to resolve the dispute saw limited progress and were eventually stopped all together by Daniel McComb in 2017 who asserted Sierra's claim to the territories, compelling Mexico to end formal diplomatic ties.
Since 2017, diplomatic negotiations and discussion between both Mexico and Sierra have been done through mediation by outside parties, mainly by neutral Placentia, Tournesol, and the Conference of American States. Since 2021, tensions have arisen over the establishment of Bajaría as a constituent country of the Kingdom of Sierra in the El Norte region in a move that was denounced by Veracruz as an act of colonial aggression and denounced Bajaria as an illegitimate polity. The resulting tensions have caused a border crisis and has been a major source of controversy in both countries.