A thread follows one event or historical theme across the archive, wherever and whenever it appears. Pulling a thread opens up a narrowed timeline view filtered to every year that thread touches.
The destructive sacking of the semi-mythical city of Troy in the late Bronze Age, as described in the Iliad and Odyssey. Of course, while the historicity of the Trojan War and Troy itself has long been a debated subject among historians, the archeological site at Hisarlık in modern-day Turkey is generally considered to be the historical basis for the city of legend.