The controversy began on Sunday when Valverde appeared in a podcast interview, asserting that the Strait of Magellan, the southern tip of the continent, and the Drake Passage are part of Argentina’s sovereignty and must be protected. Valverde described the area as a “bi-oceanic key” between the Atlantic and Pacific oceans, stating that Argentina must maintain a presence there. These comments directly contradicted established international law and bilateral agreements that recognize the strait as Chilean territory.
In response, Chilean Foreign Minister Francisco Pérez Mackenna announced on Monday that his office would send a formal protest letter to the Argentine government, declaring that “Chile’s sovereignty over the Strait of Magellan is indisputable.” The Argentine Foreign Ministry issued a statement on Tuesday emphasizing that Argentina fully respects the treaties establishing the strait as Chilean territory. While the statement did not specifically name Valverde or offer a direct apology, it underscored Argentina’s defense of its strategic interests in the South Atlantic, the Malvinas Islands (Falkland Islands), and Antarctica.
The resolution came as Chile announced a significant reinforcement of its military presence in the Magallanes Region, the extreme south of the country. Defense Minister Barros Tocornal unveiled the plan at the Chabunco Air Force base near Punta Arenas, which serves as the headquarters for the Fourth Chilean Air Force Brigade. The initiative includes the renewal of aircraft, modernization of armored vehicles, and increased vigilance in the austral territory and Antarctica. Barros Tocornal stated that these measures are necessary to protect Chile’s sovereignty, territorial integrity, and the security of its people, citing the need to update military strategy based on current conflict scenarios in Europe and the Middle East.
The announcement occurred during a sensitive period for bilateral relations, following repeated statements from Argentine nationalist groups in August and September regarding alleged “shared sovereignty” over the Magellan Strait. Chilean President José Antonio Kast, an ally of Argentine President Javier Milei, addressed the situation on Tuesday, expressing appreciation for the Argentine government’s statements recognizing Chilean sovereignty over the strait. Interior Minister Claudio Alvarado reinforced this position, stating that “the entirety of the Strait of Magellan is undoubtedly Chilean.”
According to the Chilean Defense Ministry, Argentine Defense Minister Presti attributed Valverde’s comments to “confusion and sloppiness.” Presti assured his counterpart that the high-ranking air force officer is familiar with the applicable laws, treaties, and court rulings on the matter and acknowledged that there is no dispute that the Strait of Magellan belongs to Chile. Argentine Foreign Minister Pablo Quirno and General Valverde are scheduled to call their Chilean counterparts to make amends. This diplomatic de-escalation occurs against the backdrop of the broader Antarctic Treaty System, which preserves the territorial claims of seven states, including Chile and Argentina, while prohibiting new claims or the enlargement of existing ones.
The legal status of Antarctica remains complex, with Argentina, Chile, and the United Kingdom maintaining overlapping claims over much of the Antarctic Peninsula. However, no state exercises universally recognized sovereignty over the continent, and the Antarctic Treaty of 1959 prevents activities in the region from serving as a basis for asserting or denying territorial claims. The recent diplomatic exchange between Santiago and Buenos Aires highlights the delicate balance between domestic political rhetoric and the established treaty framework governing the region.
With the incident declared settled, attention turns to the implementation of Chile’s military modernization plan in the south, which aims to enhance security capabilities in a region of significant strategic and geopolitical importance.
