n Churchill's veins ran the blood of both of the English-speaking peoples whose unity, in peace and war, it was to be a constant purpose of his to promote. Through his father, Lord Randolph Churchill, the meteoric Tory politician, he was directly descended from John Churchill, 1st duke of Marlborough, the hero of the wars against Louis XIV of France in the early 18th century. His mother, Jennie Jerome, a noted beauty, was the daughter of a New York financier and horse racing enthusiast, Leonard W. Jerome.
The young Churchill passed an unhappy and sadly neglected childhood, redeemed only by the affection of Mrs. Everest, his devoted nurse. At Harrow his conspicuously poor academic record seemingly justified his father's decision to enter him into an army career. It was only at the third attempt that he managed to pass the entrance examination to the Royal Military College, now Academy, Sandhurst, but, once there, he applied himself seriously and passed out (graduated) 20th in a class of 130.