" In the days of sailing-ships, the English fleet operated against Brest making its base at Torbay and Plymouth. The plan was simply this: in easterly or moderate weather the blockading fleet kept its position without difficulty but in westerly gales, when too severe, they bore up for English ports, knowing that the French fleet could not get out till the wind shifted, which equally served to bring them back to their station. The advantage of geographical nearness to an enemy, or to the object of attack, is nowhere more apparent than in that form of warfare which has lately received the name of commerce-destroying, which the French call _guerre de course_. "
― Alfred Thayer Mahan , The Influence of Sea Power Upon History, 1660-1783