If we try to compare the armies of the different nations to gauge the countries with strongest armies, it would probably not be possible to do so hypothetically. However, without leading to a bloodbath, we can have a fair idea about the military strengths of countries by taking into account the arsenal in their possession, advanced technologies implemented, training, power and number of allies, size of the army, budget allocated, etc. While it is a rather subjective issue, several organizations, such as Business Insider, conduct their own studies to rank the military powers.