What is the meaning of "sunshine" in a military context?

In a military context, "sunshine" refers to the act of illuminating a target with artificial illumination, usually for the purpose of making it visible for guidance or targeting. This type of illumination can be achieved using flares or other forms of light sources to enhance visibility during night operations or in adverse weather conditions. The term conveys the idea of brightening up a target area so that it can be clearly seen and accurately engaged by friendly forces, which is crucial for minimizing the risk of friendly fire and maximizing mission effectiveness.

Illuminating targets can also aid in improving situational awareness for ground or air assets, allowing for better coordination during operations. The use of artificial illumination is vital in ensuring that those involved in the operation can identify friends versus foes, particularly in the chaotic environment of combat.