Template:OpenHistoricalMap/On this day/09/15
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- 1783
- Reading is incorporated as a borough in Pennsylvania.
- 1862
- During the American Civil War, Confederate General Robert E. Lee establishes his field headquarters for the Battle of Antietam near Sharpsburg, Maryland.
- 1869
- Meisenheim district is established in Prussia.
- 1896
- The short-lived Greater Republic of Central America is established after El Salvador, Honduras, and Nicaragua ratify the Treaty of Amapala.
- 1943
- Jackson Hole National Monument is established in Wyoming.
- 1996
- The Nanjing–Shanghai Expressway opens to traffic.
This is a selection of establishments and disestablishments on September 15, based on OpenHistoricalMap data, that automatically appears on the OpenHistoricalMap page on September 15 of each year. This list highlights important changes in the world, as well as more mundane events that demonstrate the project's ambitious tendency toward micromapping history.
Contributing
We appreciate your help in curating these events from OpenHistoricalMap data. Items should be based on fully qualified start_date=* and end_date=* tags, plus any other metadata tagged on features in OpenHistoricalMap. To the extent possible, the list should feature a wide range of years and include events from different continents.