Overview
- Argentina marks the June 10, 1829 decree that created the Comandancia Política y Militar and named Luis Vernet as its first formal act of sovereignty over the Malvinas.
- The June 10 commemoration, observed as a national day since Law 20.561 (1973), is rooted in the legal idea that Argentina inherited rights from Spain under the doctrine uti possidetis iuris.
- British forces expelled Argentine authorities on January 3, 1833, and the United Kingdom has administered the islands continuously since, a fact Argentina calls an illegitimate usurpation that does not erase its claims.
- On June 10, 2026 the foreign ministry used the anniversary to formally reject the Sea Lion oil project being advanced by companies linked to the UK and to warn of legal and diplomatic measures to halt development.
- Argentina cited UN resolutions that urge against unilateral changes in the disputed zone and framed its stance as a defense of sovereign rights and resource control, a posture that could increase diplomatic friction and legal challenges over Atlantic South energy projects.