Leopold III, Duke of Austria (b. 1351)
Leopold III (1 November 1351 – 9 July 1386), known as the Just, a member of the House of Habsburg, was Duke of Austria from 1365. As head and progenitor of the Leopoldian line, he ruled over the Inner Austrian duchies of Carinthia, Styria and Carniola as well as the County of Tyrol and Further Austria from 1379 until his death.

1386Jul, 9
Leopold III, Duke of Austria
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Events on 1386
- 9May
Treaty of Windsor (1386)
England and Portugal formally ratify their alliance with the signing of the Treaty of Windsor, making it the oldest diplomatic alliance in the world which is still in force. - 9Jul
Battle of Sempach
The Old Swiss Confederacy makes great strides in establishing control over its territory by soundly defeating the Archduchy of Austria in the Battle of Sempach.