The Defence Ministry in Moscow says the fighting broke out after the rebels attacked a government artillery unit.
俄罗斯国防部称战斗是由反叛军袭击政府军炮兵部队引起的。
奇趣工程百科
The pigeons inside of it would be trained to recognize the pattern of the target — let it be an artillery unit or a warship — and peck it on the screen when they saw it!