So whatever war you wish to name has involved the supply of weapons and money to both 'sides', usually by global manipulators. Without the supply of money and arms, through Global Eite channels, the wars could not be fought on the scale or for the duration that we have seen in horrors like Bosnia. There are many reasons. But the real motivation for starting wars is part of a much greater plan.
War always means fear and fear is the weapon most used to control and manipulate humanity.
Get people frightened and they will always give their power away to anyone they believe will protect them from whatever they are frightened of. Also, a war always changes the nature of society. That's the point we need to grasp because that is the most fundamental motivation for manipulating wars. This process continued with even greater contralisation after the Second World War in which the same people once again funded and manipulated all sides. Indeed they did all they could to embarrass it.