War tactics have constantly changed throughout history when various factions brought new 'toys' to the game and this list will present what I consider to be the tools that brought about major paradigm shifts in terms of battle.
The following are 10 countries which have the largest military personnel. The rank is not done by strength. If strength determined this ranking, USA would be first followed by Russia and then by the United States. Here are the top 10 largest military armies in numbers.