Because there is no motive, there is no willingness, no will to fight. The army is in an impasse. An army without a motive to fight is no army, cannot call itself an army. Still armies are send out to for instance Bosnia or Somalia. If the army fights, soldiers will die.
Soldiers can only die for a cause, a national cause.
They cannot die, that is do not want to die for a cause that does not concern them. Their mission and training is to defend their country or the stakes of their country. They cannot defend, as it is now, another nation or people, because their emotions will not be released. Without the necessary emotions a soldier cannot fight. Such an army is a World Army.