https://www.globalfirepower.com/ 

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Since 2006 GlobalFirepower (GFP) has provided a unique analytical display of data concerning 145 modern military powers. The GFP ranking is based on each nation's potential war-making capability across land, sea, and air fought by conventional means. The results incorporate values related to manpower, equipment, natural resources, finances, and geography represented by 60+ individual factors used in formulating the finalized GFP ranks, providing an interesting glimpse into an increasingly volatile global landscape where war seems all but an inevitability.

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https://www.globalfirepower.com/coalitions.php

Global Firepower Coalition Builder

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https://www.globalfirepower.com/countries-comparison-detail.php?country1=israel&country2=iran

Comparison of Israel and Iran Military Strengths (2024)