Jumping

Jumping is a core movement mechanic present in all Battlefield titles done by pressing, usually bound to the Spacebar on PC. It allows the player limited vertical movement (roughly one meter) to clear small obstacles, or to clear some horizontal gaps. It may also allow the player to dodge certain attacks, while temporarily preventing the player from fighting back.

In many games, jumping from a great height allows for use of a parachute for safe descent.

Battlefield 2
Jumping in depletes stamina. When stamina is depleted, the player cannot jump as high or with as much forward momentum.

Players may also "dolphin dive" by pressing while jumping, allowing them to land in prone position. This technique is somewhat infamous for also providing the prone accuracy bonus despite great physical effort that may be advantageous to the performer.

Battlefield 2142
Jumping in still depletes stamina, and also results in an immediate increase of spread (loss of accuracy), and a loss of momentum.

Battlefield: Bad Company
Jumping is no longer limited by stamina, as the stamina system is no longer present.

The button is also used to switch seats in vehicles, as consoles offer no way of selecting a specific seat.

Vaulting
allows players to vault over low cover, which reduces the player's profile. Vaulting is mostly handled by the animation system, and is possibly a client-side feature—the server merely tracks the player's position point.

Battlefield 4
The vaulting system in is slightly improved to better match the player's position with their hitboxes.

Battlefield 1
Vaulting in has been improved—players are now able to vault over high cover such as walls and tall fences. Players can also jump to catch the edge of ledges and climb up, instead of falling because of a missed jump. Although the player is greatly exposed during the maneuver, the opportunity remains to catch unsuspecting enemies by surprise, or to briefly escape into cover behind a wall.

On horseback, jumping is automatically done by the horse when approaching certain obstacles, or vehicles. This may make it difficult for the rider to attack other vehicle occupants.