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Case file

Plague of Amwas

Wikipedia's first sentence called it “outbreak of plague”. Today it says “ancient bubonic plague epidemic that afflicted islamic syria in 638–639”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
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The opening as it read in 2025

Epidemic in 7th century Syria The plague of Amwas ( Arabic : طاعون عمواس , romanized : ṭāʿūn ʿAmwās ), also spelled plague of Emmaus , was an ancient bubonic plague epidemic that afflicted Islamic Syria in 638–639, during the first plague pandemic and toward the end of the Muslim conquest of the region . It was likely a reemergence of the mid-6th-century Plague of Justinian . Named after Amwas in Palestine , the principal camp of the Muslim Arab army, the plague killed up to 25,000 soldiers and their relatives, including most of the army's high command, and caused considerable loss of life and displacement among the indigenous Christians of Syria. The appointment of Mu'awiya ibn Abi Sufyan to the governorship of Syria in the wake of the commanders' deaths paved the way for his establishment of the Umayyad Caliphate in 661, while recurrences of the disease may have contributed to the Umayyad dynasty 's downfall in 750. Depopulation in the Syrian countryside may have been a factor in the resettlement of the land by the Arabs unlike in other conquered regions where the Arabs largely secluded themselves to new garrison cities . The plague of Amwas received more attention in the Arabic sources than any other epidemic until the 14th-century Black Death . Traditional narratives about reactions to the plague of Amwas by Caliph Umar and his top commander Abu Ubayda ibn al-Jarrah informed medieval Muslim theological responses to epidemics, including the Black Death. Principles derived from the narratives were cited in debates about predestination and free will, prohibitions on fleeing or entering plague-affected lands and contagion.

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 1252412016.
Today
Wikipedia's first sentence called it “outbreak of plague”. Today it says “ancient bubonic plague epidemic that afflicted islamic syria in 638–639”. Read the current article and compare.
201020152020Oct '232025
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What Wikipedia says this is

Every article opens by defining its subject. This one was redefined since 2010, and today's defining sentence is their current revision.

Then

outbreak of plague

Now

ancient bubonic plague epidemic that afflicted islamic syria in 638–639

Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.

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