The Republic of Azerbaijan, in the first wave of the Karabakh war, was defeated due to reasons such as internal instability, weak military forces, and the support of the former Soviet Union and then Russia to Armenia. In the years after the above battle, the Republic of Azerbaijan was able to make a positive change in its political stability as well as its weapons power and achieve victory in the second battle of Karabagh (2020 AD). This process happened simultaneously with the country becoming a major oil exporter and the growth of oil rentierism. This article tries to investigate the impact of political economy and oil rentierism in the Republic of Azerbaijan on the quality of military diplomacy of the political elite and the improvement of its weaponry. The importance of the article is due to the weakness of the research literature related to the relationship of the above variables. The research question is raised as follows: "How can we analyze the impact of oil revenues on the different military results of the Republic of Azerbaijan in the two Karabakh wars?" The hypothesis of the article states: The increase in oil income and the entry of petrodollars into the government budget of the Republic of Azerbaijan after the first Karabakh war caused the political and especially military weaknesses of this country to be equal to Armenia, with the increase in the level of military expenses and the purchase of high weapons. and increase the logistic power and equipment of the army and the bargaining power of the political elites and leaders of this country.Diversification in arms supply partners and the growth of military cooperation (Russia, Israeli regime and Turkey) has meant effective military diplomacy of the Republic of Azerbaijan and has affected the budget of SOFAZ Foundation.