Analysis of information sources in references of the Wikipedia article "Breakthrough (military)" in English language version.
Under the heading 'Year of the Great Breakthrough' (perlom)[sic], Stalin gave a review of the Five-Year Plan for Pravda on November 3, 1929. The occasion was to celebrate victories on various fronts on the anniversary of the Russian Revolution. The justification for the intense industrialization drive was couched in typically military language [...].
Истекший год был годом великого перелома на всех фронтах социалистического строительства. Перелом этот шел и продолжает идти под знаком решительного наступления социализма на капиталистические элементы города и деревни. [This year has been the year of the great breakthrough on all fronts of the construction of socialism. This breakthrough took place and continues to take place under the sign of a determined attack by socialism on the capitalist elements in town and country.]
