The services Colonel Churchill continued to yield the royal brothers did not pass unrewarded. He was created Baron Churchill of Agmouth, in Berwickshire; and a friendship sprung up between Lady Churchill and the Princess (afterward queen) Anne, who, when she married Prince George of Denmark, got her friend appointed lady of her bedchamber.

The day after James II. was proclaimed, he made his favorite, lieutenant-general. The battle of Sedgemoor, in which the ill-fated Duke of Monmouth with his rebel army was defeated, was won chiefly by Churchill's courage and decision. Till the closing scene of James's reign, there is little stated of Lord Churchill, although it is known that he used his influence with his royal master to prevent the arbitrary system of government the king endeavored to introduce. Finding the monarch determined to persist in his encroachments, Lord Churchill felt it his duty, however painful, to go over to the Prince of Orange, by whom he was received with distinguished marks of attention and respect; and, two days before his coronation, the prince raised him to the dignity of Earl of Marlborough.

The affection the earl still felt toward his late benefactor, the ex-king, led him into a correspondence with him. This, being discovered, brought the displeasure of King William upon him, and for some time he was deprived of all his appointments. At length a governor being wanted for the young Duke of Gloucester, son of the Princess Anne, the king, as an earnest of his returning favor, conferred this honor on Marlborough. "Teach him, my lord," said his majesty, "to be what you are yourself, and he will not want accomplishments."

On the accession of Queen Anne, Marlborough was made captain-general, master of the ordnance, and a knight of the garter. Soon after, he was sent to Holland to aid the Dutch against the French. He was appointed by them generalissimo of the forces, with a salary of £10,000 a year. With his army he crossed the river Meuse, and advanced to the siege of Rheinberg. "I hope soon to deliver you from these troublesome neighbors!" he exclaimed to the Dutch deputies who accompanied him on a reconnoitring party; and had it not been for the timidity of the Dutchmen he would have fulfilled his intentions. He however, took three towns out of the hands of the French, and the campaign ended by the taking of Liége.

Marlborough soon returned to England, when the queen created him Marquis of Blandford and Duke of Marlborough, an honor he reluctantly accepted, and chiefly because it would give him more consideration if again called upon to serve his country abroad.

In 1703 the duke was once more in Flanders, leading operations against the French with his usual success.

The celebrated Prince Eugene was appointed his colleague; and the first time these two generals met, they conceived that mutual esteem and confidence, which afterward rendered them partners in the same glory.

At the head of a noble army, the two generals penetrated into the heart of Germany, driving the Elector of Bavaria before them, ere his French allies could join him. It would take too much space to describe all the victories, and relate the details of the burning of three hundred towns, villages, and castles! These stern necessities of war were far from pleasing to Marlborough, who grieved to see the poor people suffering from their master's ambition. The Elector shed tears when he heard of these devastations, and offered large sums to prevent military execution on the land. "The forces of England," replied the duke, "are not come into Bavaria to extort money, but to bring its prince to reason and moderation. It is in the power of the Elector to end the matter at once by coming to a speedy accommodation."

But the Elector knew that Marshal Tallard, with a powerful French army, was approaching; and, buoyed up by expectation, replied, "Since you have compelled me to draw the sword, I have thrown away the scabbard!"

Prince Eugene had hastened from the Rhine to join Marlborough, with a force of eighteen thousand men, and reached the plains of Hochstadt by the time Tallard joined the Elector. As the prince and Marlborough proceeded to survey the ground, previous to taking up their position, they perceived some squadrons of the enemy at a distance. The two generals mounted the steeple of a church close by, and, with their glasses, discovered the quarter-masters of the enemy marking out a camp between Blenheim and Lützingen. Charmed beyond measure, they resolved to give battle before the enemy could strengthen themselves in their new position. Some officers, who knew the strength of the ground selected by the enemy, ventured to remonstrate, and to advise that no action should be hazarded. "I know the dangers of the case," said Marlborough, who had not made up his mind without due consideration, "but a battle is absolutely necessary; and as for success, I rely on the hope that the discipline and courage of the troops will make amends for all disadvantages." Orders being issued for a general engagement, the whole army commenced preparations with cheerfulness and alacrity.