Modern warfare is posing an increasing difficulty for journalists trying to identify who shot who, so the UN has called for all future munitions to be colour coded. After they explode it can then be quickly and easily determined who was responsible.
The recent case of a passenger jet, apparently blown out of the sky by a missile, was the last straw. Had colour coded explosives been used then we would all be able to see the lovely rose pink of Russian involvement and save a lot of arguing.
Current conflicts in Syria and Gaza are posing the same problem for both those involved and outside observers, with each side blaming the other.
Colours to be used would primarily be allocated according to local traditions and customs, with the UN having final say. The future Scottish army will be trying to stay out of all trouble spots as a tartan dye may be a bit of a challenge.