What is the longest hostage standoff?

The longest hostage standoff in history occurred during the 1977-1978 incident involving a group of armed militants in a building in Stockholm, Sweden. The standoff lasted for 130 hours and ended on February 28, 1978, when police stormed the building. This event is often remembered as the basis for the term "Stockholm syndrome," describing the bond that can develop between hostages and their captors.