"We have long possessed the art of war and the science of war, which have been evolved in the minutest detail"

Fredrik Bajer's quote speaks to the long history of warfare and the advancement of the art and science of war. He is recommending that the art and science of war have been studied and improved over time, to the point where they have actually been refined in the tiniest of information. This implies that the art and science of war have actually been studied and surpassed for centuries, and that the understanding and methods utilized in warfare have actually been sharpened to a high degree of precision. This quote also suggests that the art and science of war are two distinct disciplines, and that both are required for a successful military campaign. The art of war is the strategic and tactical planning of a campaign, while the science of war is the application of innovation and clinical principles to the battlefield. By integrating the two, a military force can get a benefit over its opponents. This quote is a suggestion of the importance of studying and understanding the art and science of war, and how they can be utilized to acquire a strategic benefit in battle.