AI overview
I don't have sufficient context to write an accurate overview of "773." While you've indicated it relates to a year, I would need additional information about what specifically "773" refers to (a historical event, cultural phenomenon, scientific discovery, etc.) to provide a factual and meaningful explanation.
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Article
Frankish cavalry (with mail armour)
Year 773 (DCCLXXIII) was a common year starting on Friday of the Julian calendar, the 773rd year of the Common Era (CE) and Anno Domini (AD) designations, the 773rd year of the 1st millennium, the 73rd year of the 8th century, and the 4th year of the 770s decade. The denomination 773 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.