AI overview
I don't have enough context to write an accurate overview of "870" based solely on the information that it refers to a year. To provide a plain-language explanation of what 870 is and why it matters, I would need additional historical context about significant events, figures, or developments associated with that year. Without that information, I cannot responsibly write the overview without inventing facts.
AI-generated from the Wikipedia summary — may contain errors.
Article
Division after the Treaty of Meerssen (870)
Year 870 (DCCCLXX) was a common year starting on Sunday of the Julian calendar, the 870th year of the Common Era (CE) and Anno Domini (AD) designations, the 870th year of the 1st millennium, the 70th year of the 9th century, and the 1st year of the 870s decade.