"Urusvati grows indignant when she hears about war... and We are all saddened by the barbarism of humanity. The most negative manifestation of free will is seen in outbursts of war. People refuse to think about the terrible currents they evoke by mass murder and the consequences it will bring. The ancient Scriptures correctly warned that he who lives by the sword will perish by the sword. There is a difference between the karma of aggression and that of defense. It can be shown how aggressors suffer the most grievous consequences and how terrible their condition is in the Subtle World. People delude themselves by thinking that great conquerors do not reap bad karma during their earthly lives. But karma has its own timely approach, and does not show itself immediately. Life is continuous, and the wise ones understand their lives as a single necklace. Aggressors burden their karma not only by killing but also by polluting the atmosphere, which occurs during war. The poisoning of Earth and of the other spheres is long-lasting. You who intrude into the lands of your neighbors, has no one told you the consequences of your fratricide? Our Abode has witnessed many wars, and We can testify how this evil is increasing in the most unexpected ways. People know that explosions can cause rain, but what about poison gas and its possible effects? How sad We are to see free will, which was bestowed as the Highest Gift, manifested in this horrible, uncontrolled way. 88."
January 1, 1970
https://en.wikiquote.org/wiki/Karma