Death Zone

In Star Wars: Battlefront Series, the outside of the map is considered a "death zone," where units that crossed it for an extended period will die. Normally an outside of the map was enclosed by a barrier. But standing too close to the barrier will cause the unit to meet the same fate. First warning included "Leaving Battlefield" message that flash in the middle of the screen. Along with the HUD display, your commanding officer will speak with you in dismay.

Galactic Republic

 * "You've miscalculated your position, trooper! Return to battle!"
 * "Where are you going, soldier!? Get back to the battle!"
 * "Return to battle, trooper!"

CIS

 * "Wrong way! Error, error!"
 * "Navigation error! Return to the battlefield!"
 * "Warning, you are leaving the battlefield!"

Rebel Alliance

 * "Come on, soldier, get back in the game!"
 * "Where are you going!? Get back to the battle!"
 * "You're going the wrong way!"

Galactic Empire

 * "Return to battle!"
 * "Are you lost? Get back to the battle!"
 * "Get back to the action, trooper!"

Trivia
In any BFI maps imported to BFII the map will not have a death zone, instead the map will continue to clone it's self in a loop.