Igor Markov's answer to Why does the US government spend so much on military? Jon Davis' answer to Given that China is fine without blue-water navy, why does the US need one? Being even is the Deadliest form of Warfare
Imho the most influential war in history is the Caesar Augustus' failing attempt to conquer the Germans. He sent two legions over the Limes Renano expecting to tame the german population. It didn't happened: in the Battle of Teutoburg Forest the army of 15.000 well trained roman solders was completely slayed but Germans. In a what if...
there are many battles occurred but some of them were so important which actually sets turning point for History of India 10.battle of hydaspece 9.battle of kalinga 8.Second Battle of Tarain 7.The First Battle of Panipat 6.third battle of panipat 5.battle of plasey 4.battle of phool baug 3.battle of maisoor 2.battle of koregoan 1.Indo-Pakistani War 1947