A strategos was not solely concerned with winning battles — the tactics. He was, in the later words of Clausewitz, concerned with the use of battle to further the political ends of his city. In other words, the strategos had to keep the long-term goal in mind and ensure that the tactics work to further that goal. A tactician would never abandon key terrain without a fight; it makes little tactical sense. But strategy may demand that very thing and tactics must be subordinated. This exact situation occurred during the Persian Wars in Fifth Century Greece. The first major Greek strategist, and perhaps the most gifted, was Themistocles.