There have been many instances throughout history both in recent history and ancient history where numerically inferior forces triumphed against the odds. But the reasons why an army of say 70,000 mean can defeat another army of three times its size isn’t down to luck but strategy. That particular strategy is often derived by a process of knowing three things intimately. These are your own army and its capabilities, the battleground, and the opposing army and its capabilities. Grouped in with those capabilities are the skills and knowledge of the opposing commanders.
If you group all of those together then a strategy can be formed. It is not very difficult to win a battle when your numbers dwarf that of the enemy as a victory can be attained with nothing more than brute force. But when the numbers come closer to equalisation then other possibilities emerge. In poker then you will often have to deal with strong opponents. But all poker players have weaknesses and it is just a case of finding them and then exploiting them.
For example in full ring games then I often do the exact opposite of what many poker theorists say that you should do and that is to play against other regs. These strong players are supposed to be the ones that you should avoid but yet they too have weaknesses despite being winning poker players. For example they may not stack off with second best hands all that often but you should not expect a strong reg to make that type of error anyway.
