Britain had declared war on the Germans on the 3rd of September ( 8 Things You…). This is when the Battle of Britain had started. The Battle of Britain had been a turning point from July 10th to October 31st ( 8 Things You…). This military turning point had been a big win for the RAF. The Battle of Britain was a turning point because it showed that the Luffwuffe could be defeated ( 8 Things You…).