How did the camera shake in war movies do it?

This kind of shaking is basically achieved by processing during shooting and post-production after shooting. The camera used in the shooting process is generally light, which is not easy to fall off with hands or shoulders, and has good seismic performance. If it is the push-pull and swing of the line, it depends on the photographer's skill and control. If it is the jitter of fixed aircraft position, it is necessary to estimate the direction and amplitude of jitter influence in advance. Post-production is basically editing and special effects, depending on the level of software and hardware and production experience. Generally speaking, it is not difficult to achieve this effect.