In novels, the term " 300 rounds of war " usually referred to a war that lasted for 300 rounds. There was usually no clear time interval between each round. This term was usually used to describe the length and intensity of the war, implying that the war could last for a long time. However, in reality, the term " 300 rounds of battle " did not have an exact time definition. It depended on the plot and setting of the novel, as well as the specific situation in the war. In some novels, each round may take a few minutes or hours, while in others, each round may take days or months. Therefore, the specific meaning of the phrase 'three hundred rounds of war' depended on the plot of the novel.