21 September on the map of history
3 events the records the map draws date to 21 September, from 1943 to 1981. Each one opens the map on that very day.
- 1943
Cephalonia — after the Italian armistice, some 5,000 men of the Acqui Division are executed by their former allies
War record · World War II · 1943-09-21 – 1943-09-26
Open the map on this day → - 1949
The map begins drawing West Germany; the map stops drawing Germany (Western Allies)
Border record (CShapes 2.0)
Open the map on this day → - 1981
The map begins drawing Belize; the map stops drawing British Honduras (UK)
Border record (CShapes 2.0)
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).