"The effect of breaking an enemy's line, or order-of-battle, depends upon several conditions. The essential idea is to divide the opposing force by penetrating through an interval found, or made, in it, and then to concentrate upon that one of the fractions which can be least easily helped by the other. In a column of ships this will usually be the rear. The compactness of the order attacked, the number of the ships cut off, the length of time during which they can be isolated and outnumbered, will all affect the results. A very great factor in the issue will be the moral effect, the confusion introduced into a line thus broken. Ships coming up toward the break are stopped, the rear doubles up, while the ships ahead continue their course. Such a moment is critical, and calls for instant action; but the men are rare who in an unforeseen emergency can see, and at once take the right course, especially if, being subordinates, they incur responsibility. In such a scene of confusion the English, without presumption, hoped to profit by their better seamanship; for it is not only 'courage and devotion,' but skill, which then tells. All these effects of 'breaking the line' received illustration in Rodney's great battle in 1782."[1] [Footnote 1: THE INFLUENCE OF SEA POWER UPON HISTORY, pp. 380-381.] Before we leave the War of American Independence mention should be made of Commodore Suffren who, as we have seen, left de Grasse with five ships of the line to conduct a campaign in the Indian Ocean in the spring of 1781. His purpose was to shake the British hold on India, which had been fastened by the genius of Clive in the Seven Years' War. But the task given to Suffren was exceedingly difficult. His squadron was inadequate--for instance, he had only two frigates for scout and messenger duty--and he had no port that he could use as a base in Indian waters. To conduct any campaign at all he was compelled to live off his enemy and capture a base. These were risky prospects for naval operations several thousand miles from home, and for the faintest hope of success required an energy and initiative which had never before appeared in a French naval commander. In addition to these handicaps of circumstance Suffren soon discovered that he had to deal with incorrigible slackness and insubordination in his captains.