+A Passport Union is an agreement between states that allows citizens of member countries to cross shared borders without a [Passport](/wiki/passport) or with simplified travel documents. This arrangement fosters greater [Free Movement](/wiki/free_movement) and deeper integration among participating nations. Such unions aim to streamline travel, promoting economic and cultural exchange by reducing traditional border formalities.
+## See also
+- [Schengen Area](/wiki/schengen_area)
+- [Border Control](/wiki/border_control)
+- [Travel Area](/wiki/travel_area)
... 1 more lines