Это в наших силах (We Can Do It) 1970, directed by Lev. Atamanov.
Description from Dr. Grob’s Animation Review:
From a fascistic egg sprouts a military bird.
The young bird is fed by a capitalist and a general (who both are clearly American) with money and weapons. It grows into a huge black war-bird, which flies over the whole world, threatening loving couples in London, Paris, Moscow and Japan, and an old man, two mothers and several children in an unclear place. When the war-bird starts to attack, one mother turns Asian, Muslim and black, in order to illustrate that war can affect everybody everywhere. Eventually, however, the war-bird is overthrown by a multitude of peace doves, created by workers, writers, children, artists, musicians and pacifists.
‘We Can Do It’ is a beautiful and strikingly pacifistic film and undoubtedly one of the best propaganda films ever created in the Soviet Union. Despite its anti-American sentiment, its pacifistic theme is timeless and universal. The film tells its clear message without any dialogue or voice over. Moreover, its designs are stunning and very effective, especially that of the war-bird.