Argentina, 1960 — military coup attempt

Despite extensive searching (English and Spanish-language sources, Wikipedia's Military coups in Argentina article, FRUS 1958-1960 volume V, todo-argentina.net's year-by-year Frondizi timeline, Argentine press retrospectives), I could not find any independent source describing a specific attempted military coup in Argentina on June 13, 1960. Sourced Argentine-history timelines for 1960 mention military pressure from General Toranzo Montero (resulting in a war minister's resignation) and Plan CONINTES in March 1960, and a separate, well-documented failed Peronist uprising led by General Iñíguez in November 1960 — but no June 13 event. It is possible this Cline Center-coded event refers to a lower-profile garrison mutiny or an internal military ultimatum not covered in the general-audience sources I could access, or it may be a coding of the broader Toranzo Montero pressure episode with an approximate/different date attribution. I am not willing to assert either explanation without a source confirming it. The three facts above provide sourced context for the period but do not confirm the specific dated event, so I cannot name a target leader for this specific record with any sourcing confidence beyond noting Frondizi was president throughout this period (a fact so well established it needs no individual citation, but I am not treating it as confirmation that HE was the target of this specific June 13 action). | Re-fetched the sole cited source (todo-argentina.net's 'Año 1960' page) directly and via web search cross-checks; the page is live and does contain the Toranzo Montero memorandum language, the Plan CONINTES March 13 1960 detail, and the November Iñíguez-uprising line substantially as summarized. Direct curl access to the domain was blocked by the sandbox's egress proxy (403 on CONNECT), so verification relied on the WebFetch tool (two independent fetches, consistent results) plus independent corroboration via Spanish Wikipedia articles (Plan_CONINTES, Levantamiento_del_30_de_noviembre_de_1960, Rodolfo_Larcher, Carlos_Toranzo_Montero) and WebSearch. Found one real problem: fact #1's 'In early 1960' date claim is contradicted by Wikipedia's Larcher and Toranzo Montero articles, which independently and specifically date Larcher's actual resignation to October 15, 1960 — after, not before, the June 13 target date. I corrected that fact's text to strip the false date claim and flag the discrepancy rather than remove the fact outright, since its substantive content (the memorandum demands, the resignation itself) is genuinely sourced. Also flagged that fact #2's casualty/conviction numbers are this-source-specific and diverge from other historians' estimates per Wikipedia; kept the fact but added a caveat. Fact #3 (Iñíguez, November 30 1960) is strongly corroborated by an independent dedicated Wikipedia article and press coverage, unchanged. Confirmed independently (via Wikipedia's Argentina coup-list articles and multiple targeted searches for '13 de junio de 1960') that no source describes a June 13, 1960 coup attempt — target_leader NONE is well supported and kept, with the reason text tightened. Original summary field was empty, so nothing to trim there.