Space Exploration Timeline

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Mar 16, 1966 23:14
  –  

Gemini 8 first orbital docking (with Agena target vehicle)

First-ever orbital docking between the Gemini spacecraft and the Agena Target Vehicle. After several rendezvous maneuvers and close-range inspections, Armstrong guided Gemini 8 to a successful hard-dock, a milestone critical to future lunar mission profiles.

https://en.wikipedia.org/wiki/Gemini_8