Guatemala, 1949 — military coup attempt

Date discrepancy: the Cline Center record lists 1949-07-09, but every independently corroborated source (Gleijeses's 1990 Journal of Latin American Studies article, accessed directly; Encyclopedia.com entries on Arana and Arévalo) places the assassination of Arana and the resulting military revolt on 18-19 July 1949, not 9 July. This is very likely the same event the dataset intends to record (there is no other documented Guatemalan coup attempt around 9 July 1949), but the exact date could not be reconciled and is flagged here rather than silently corrected. Casualty figures also disagree between sources: Gleijeses's original 1990 journal article (directly verified via PDF) states approximately 500 dead and over 200 wounded, while Wikipedia, citing Gleijeses's later 1991 book "Shattered Hope" (not independently accessible this session, paywalled/no free full text found), gives a lower figure of approximately 150 dead and 200 wounded -- possibly a revised figure in the book version. Both figures are reported above rather than one being silently chosen. The Cambridge Core page for the 1990 article is paywalled beyond its opening extract, but that extract itself was directly fetched and quoted; a separately hosted PDF purporting to be the full article text (latinamericanstudies.org) was also directly fetched and used for the more detailed facts -- I could not independently confirm the hosted PDF is an unaltered copy of the published article, though its content is internally consistent with the paywalled Cambridge extract and other sources. | Adversarial re-check performed by fetching every source_url directly (not trusting the original researcher's quotes). CONFIRMED CLEAN: All 8 facts labeled VERIFIED held up. I independently re-fetched (a) the paywalled Cambridge Core preview page, (b) the latinamericanstudies.org hosted PDF, (c) the Encyclopedia.com "Arana, Francisco J." entry, and (d) the Encyclopedia.com "Arevalo Bermejo" entry. All four pages are live/real, and every quoted string in the original entry was found verbatim (or near-verbatim, fairly summarized) in the actual page content. The Cambridge preview and the hosted PDF's opening paragraph match word-for-word, which is good evidence the hosted PDF is a faithful copy of the real 1990 Gleijeses article, at least for that section. target_leader also checked out. CORRECTION MADE (this is the substantive finding): the CHAIN fact's source citation was inaccurate. The original entry stated Wikipedia's lower casualty figure (150 dead) and the 16 July ultimatum came from "Piero Gleijeses, Shattered Hope: The Guatemalan Revolution and the United States, 1944-1954, 1991, pp. 543-547." I fetched the Wikipedia article directly, three separate times with different targeted prompts (including a request to output its full bibliography and a direct string search for "Shattered Hope" and "1991"), and confirmed: neither "Shattered Hope" nor "1991" appears anywhere on the page. Wikipedia's own footnotes 20 and 21 for these two claims cite Gleijeses's 1990 Journal of Latin American Studies article -- the SAME article already used for six of the other facts in this entry, at the same page range (pp.541-547, within the article's 527-552 span). This means the original entry's framing ("a separate account... gives a lower casualty estimate... possibly a revised figure in the book version") mischaracterizes the sourcing: this is not an independent later source, it's Wikipedia's own paraphrase of the identical source/page already relied upon elsewhere, and it directly contradicts the hosted PDF's "500 dead" figure for that same page. I corrected the CHAIN fact's source_name and text to reflect this, and flagged the unresolved 500-vs-150 contradiction as a genuine open question (possible OCR error in the hosted PDF, or a paraphrase error on Wikipedia) rather than accepting the original entry's unsupported "revised in the book" explanation. Summary was trimmed: removed "and Árbenz's chief rival" (not established by any quoted fact -- the source only says Arana and Árbenz were "perhaps equal in prestige, but not in power" within the officer corps, not explicitly "rivals"), softened "aimed at overturning the Arévalo government" to "against the Arévalo government" (closer to what fact 8's "military rebellion" phrasing actually supports), and changed "November 1950 presidential election" to "1950 presidential election" since no quoted fact specifies the month (the month is independently confirmable in the same hosted PDF, but wasn't pulled into the facts array, so it's trimmed per the strict-sourcing rule). Also updated the casualty description in the summary to state plainly that the two figures conflict rather than vaguely noting "estimates differ." Date discrepancy (Cline Center lists 1949-07-09 vs. every corroborated source placing the event 18-19 July 1949) is unchanged from the original entry's note and remains unresolved/flagged, not silently corrected -- this is a reasonable and honest disclosure, not a sourcing violation.