26 September on the map of history
4 events the records the map draws date to 26 September, from 1914 to 1918. Each one opens the map on that very day.

- 1914
Battle of Sandfontein — the opening South African column is surrounded at a waterhole
War record · World War I
Open the map on this day → - 1916
Battle of Sibiu — the Romanian invasion of Transylvania is thrown back through the passes
War record · World War I · 1916-09-26 – 1916-09-29
Open the map on this day → - 1918
The Meuse–Argonne offensive — 1.2 million Americans, the largest battle in United States history
War record · World War I · 1918-09-26 – 1918-11-11
Open the map on this day → - 1918
The capture of Damascus — Australian light horse and the Arab army enter the city on the same morning
War record · World War I · 1918-09-26 – 1918-10-01
Open the map on this day →
What this page states
A border event is what the border record states about its own outlines, under the names IntMap’s map writes on that day: «the map begins drawing», «stops drawing», «new borders for». It is computed by the map’s own code, comparing the day with the day before.
A name the record does not date is not listed: the map’s table of era names is written in years, so a renaming that falls on another country’s border day is left out.
OpenHistoricalMap, which the map draws from 1689 to 1885, is not included: its dates carry no precision, and most of its first-of-the-month dates are months or years written as days.
The war record covers only the wars IntMap documents day by day (World War I, World War II, Korean War, Vietnam War, Arab–Israeli Wars, Yugoslav Wars).
Sources
CShapes 2.0 (Schvitz et al. 2022, icr.ethz.ch/data/cshapes) · CC BY-NC-SA 4.0
Territory and dates: the documented record, compiled in scripts/wars/. Country outlines: CShapes 2.0 (Schvitz et al. 2022, icr.ethz.ch/data/cshapes).