The movie is, overall, fairly violent, but nothing out of bounds for a PG-13 movie. There are a lot of scenes with nonstop explosions and gunfire. Body count is high throughout the movie--many people are killed by guns, bombs, knives, and vehicle accidents. Some of these scenes do include a fair amount of blood (on people's faces and wounds, but nothing gory).
One of the goriest scenes includes a man stabbing an ice pick through another man's arm. We graphically see the bloody wound for a few seconds. In the same scene, there's a lot of brutal physical fighting displaying mild blood.
Most scenes with a high body count show little blood. In the scenes where individuals are killed, often the wound is shown - bullet hole in forehead, back or chest; knife to the neck, etc.
One character gets shot in the center of his forehead, and the wound can be seen before he collapses.
We see a slightly unsettling wound at the back of a man's broken neck.
A man jumps out of a plane to kill himself.
A commando forces a prisoner to climb out of a castle window, obviously killing himself in the drop.