Also a term used to describe the attempt one makes to repair a broken relationship. It's sometimes used in news programmes to describe the initial steps in peace processes and ceasefires.

An Advance in Sid Meier's Civilization.
An important advancement in any civilization is the development of infrastructure construction improvements, which facilitate trade and communication. The Romans developed bridge building to a degree that it took Western medieval engineers many years to match.
Prerequisites: Iron Working and Construction.
Allows for: Railroad.