It was all the worse for Oliver from the financial point of view, that he was now pursuing a foreign policy which—whatever opinion we may have of it on other grounds—at least increased the burdens of the nation to a point at which Englishmen began to grow restive. Even before the signature of the Dutch peace in the spring of 1654, Oliver had cast about in his mind for a foreign policy, and it was only on rare occasions that he appears to have contemplated the possibility of keeping peace with all nations unless he were compelled to engage in war in defence of the honour or interests of the country. He seems to have regarded the victorious fleet bequeathed to him by the Commonwealth and the victorious army which he had done more than any other man to forge into an instrument of dominion, as inviting him to choose an enemy to be the object of his defiance, rather than sure guards for the country which he ruled. The sword itself drew on the man, and the weakness of the two great Continental nations, France and Spain, embroiled in an internecine war, each coveting the alliance of England, and each dreading her enmity, increased its attractive power.

Not that Oliver was without principles underlying his actions. He had indeed two—not always easily reconcileable. He wanted to increase the trade of the country by strengthening its maritime power, and he wanted to uphold the cause of God in Europe by the formation of a great Protestant alliance against what he believed to be the aggressive Papacy. This second principle gave to his actions a nobility which only an honest devotion to higher than material interests can impart, whilst at the same time it led him into the greatest practical mistakes of his career, because he was always ready to overestimate the persecuting tendencies of the Roman Catholic States, which, since the Peace of Westphalia, had been local and spasmodic, and to overestimate the strength of religious conviction in the rulers of Protestant States, as well as to imagine it possible to unite these last in a Protestant crusade. It was a still more deplorable result that his own character became somewhat deteriorated by the constant effort to persuade himself that he was following the higher motives, when in reality material considerations weighed most heavily in the scale.

In truth, Oliver's day of rule lay between two worlds—the world in which the existence of Protestantism had been really at stake, at the time when men so alien from the dogmatism of the sects as Drake, Raleigh and Sidney had enlisted in its cause—and the world of trade and manufacture, which was springing into being. Oliver's mind comprehended both. Doubtless his mind was the roomier that it could respond to the double current, but it was not to be expected that a generation whose face was set in the direction of material interests should be otherwise than impatient of a call to the Heavens to place themselves on the side of English trade.

During the greater part of 1654 Oliver had been hesitating whether to ally himself with Spain or with France. For some time he inclined to the side of Spain. His religious sympathies were touched by the sufferings of the French Huguenots. The succour which he proposed to convey to them would have brought him into direct alliance with Spain, and it was only the revelation of Spanish financial and military weakness which turned him aside from his project. Then came a suggestion long weighed and finally taken up, for carrying on war against the Spanish West Indies. It would be hard to deny that, even in modern eyes, a casus belli, apart from all ideal schemes of weakening the Government which sheltered the Inquisition, was to be found—not in the refusal of the Spanish authorities to allow English ships to trade in the Spanish islands, but in the deliberate seizure of English ships and the enslavement of English crews guilty of no other crime than that of being bound for Barbados or for some other English colony. The strangest part of the matter is that Oliver closed his eyes to the natural consequence of an attack upon a Spanish colony. He fancied that it would be still possible to carry out the Elizabethan plan of keeping peace in Europe and making war in the Indies. He was probably strengthened in this opinion by the fact that, almost from the first days of the Commonwealth, a war of reprisals had been going on at sea with France without disturbing the nominally amicable relations between the two countries. Why should he not take a West Indian Island as a reprisal for the seizure of English ships, and peace be maintained with Spain as if nothing had happened?

Before the end of 1654 two fleets sailed on their several missions. The one, under Blake, entered the Mediterranean, where he was most hospitably received by the Governors of the Spanish ports and by the officials of the Grand Duke of Tuscany at Leghorn. He ransomed a number of English captives at Algiers, but the Bey of Tunis, some of whose subjects had recently been sold for galley-slaves to the Knights of Malta by an English scoundrel, was naturally less compliant. Blake destroyed nine of his vessels at Porto Farina, but Tunis itself was inaccessible, and he was unable to recover a single English slave from that quarter. Penn sailed for Barbados with some 2,500 soldiers on board under Venables. Both in Barbados and in other English islands reinforcements were shipped, and with this ill-compounded force a landing was effected in Hispaniola. The attempt to seize on the city of San Domingo failed, and the expedition sailed for Jamaica, at that time little more than a desert island, and established itself in possession. Some years passed before the colony became self-supporting, but Oliver was unremitting in his resolution not only to increase the numbers of the first military settlers, but to supply them with all things necessary for the foundation of homes in the wilderness. It was annoying that the first operations in the Spanish West Indies had opened with a check, but it was doubtless fortunate that the new English colony was not built up on Spanish foundations. The soldiers who, on their march towards San Domingo, pelted with oranges an image of the Virgin which they had torn down from the walls of a deserted monastery, would hardly have been at their best in the midst of a Roman Catholic population.

Much to Oliver's surprise, the news of the proceedings of his men in Hispaniola aroused the bitterest indignation at Madrid, an indignation already, to some extent, aroused when Blake sailed out through the Straits of Gibraltar to meet and capture the treasure ships expected from America. The features of Philip IV. as—thanks to the brush of Velasquez—they meet us in every noted gallery in Europe, are not those of a man remarkable for wisdom, but he had none of the lingering hesitancy of his grandfather, Philip II. He ordered the seizure of the property of English merchants in Spanish harbours; and Oliver, after balancing for two years between France and Spain, had the question decided by his own mistaken belief that the world of Elizabeth remained unchanged. The breach with Spain necessitated a reconsideration of the relations between England and France. Ever since his accession to the Protectorate, Oliver had evaded the demands of the French Ambassador, Bordeaux, for a cessation of the war of reprisals at sea which had been bequeathed him by the Commonwealth. As English privateers captured more prizes than those of the French, he was in no hurry to bring the situation to an end till he obtained of Mazarin, the virtual ruler of France, a tacit understanding that the Huguenots should no longer be maltreated, and an express undertaking to expel from France the English Royal family and the chief Royalists in attendance on the exiled Court. Whilst these questions were still under discussion, an event occurred which, more than any other single action in his life, brought into relief the higher side of Cromwell's character and policy. In January, 1655, the young Duke of Savoy—or rather his mother, who, though he had come to years of discretion, acted in his name—ordered that the Vaudois, whose religion, though now akin to the Protestantism of the seventeenth century, dated from mediæval times, should be removed from the plain at the foot of the Piedmontese Valleys into which they had spread, to the upper and barer reaches, on the pretext that they had broken the bounds assigned them by his ancestors. In April his troops entered the valley, slaying and torturing as they went. When the news reached England in May, Oliver's heart was moved to its depths. He ordered a day of humiliation to be held, and a house-to-house visitation to collect money for the sufferers. Upwards of £38,000 was gathered in the end, the Protector heading the list with £2,000. He sent a Minister to Turin to remonstrate, but his warmest appeals were addressed to Mazarin, the all-powerful Minister of Louis XIV., as some French troops, acting as allies of the Duke in his war against the Spaniards in Italy, had been concerned in the massacre. Mazarin was plainly told that there would be no treaty with France till these massacres were stopped. The French Minister had been so long deluded of his hope of a treaty that this threat alone might not have terrified him, but he feared that Oliver would hire the Protestant Swiss to take part against the Duke of Savoy, and that all thought of fighting the Spaniards in Italy would have to be laid aside for that year. Communications passed between Paris and Turin, and the Duke of Savoy issued his pardon—such was the term employed—to the surviving Vaudois.

Milton's sonnet marks well this highest point of the Protector's action upon Continental States:—

Avenge, O Lord, thy slaughtered saints, whose bones
Lie scattered on the Alpine mountains cold;
Even them who kept thy truth so pure of old,
When all our fathers worshipped stocks and stones
Forget not: in thy book record their groans
Who were thy sheep, and in their ancient fold
Slain by the bloody Piedmontese, that rolled
Mother with infant down the rocks. Their moans
The vales redoubled to the hills, and they
To heaven. Their martyred blood and ashes sow
O'er all the Italian fields, where still doth sway
The triple Tyrant; that from these may grow
A hundred fold, who having learnt thy way
Early may fly the Babylonian woe.

In championing the Vaudois, Oliver's Puritanism had served the noblest interests of humanity. With somewhat of the poet's fervour Milton saw in the defence of the oppressed victims of the Duke of Savoy a challenge to the spiritual tyranny of Papal Rome. It made Oliver, we may be sure, more ready to take up the challenge of Spain, and to come to terms with the French Government which had spoken on the side of tolerance. Yet, enthusiastically Puritan as he was, he could not deal with the external affairs of England from a merely or even a mainly religious point of view. His position would not allow it—nor his character. The mingling of spiritual with worldly motives might produce strange results. At one time it elevated and ennobled action. At another time the two motives might clash together, the one frustrating the other. In the stand taken by Oliver on behalf of the Vaudois, the spiritual had predominated over the material aim. In the breach with Spain, his belief in the predominance of the religious motive burnt strongly in Oliver's own mind: it was less conspicuous to onlookers.

The first result of the quarrel between England and Spain was the conclusion of a commercial treaty with France, which put an end to the war of reprisals which had now lasted more than six years. All question of a closer alliance was reserved, perhaps rather because it demanded time for consideration than because there was any doubt in Oliver's mind as to his intention in the matter. Before the war had been far prolonged the exiled King took refuge in the Spanish Netherlands, holding close communication with Englishmen who plotted the destruction of the Protector, whilst privateers issuing from Dunkirk and Ostend preyed upon English commerce and irritated the London merchants who had no enthusiasm for a religious war, and who regretted the loss of their goods seized in Spanish ports. In the spring and summer of 1656 the necessity of doing something against an active enemy established so near the English coast would have driven Oliver into the arms of France even if he had not already contemplated such an alliance. Yet it was during these very months that the desired end seemed to be eluding his grasp. Mazarin, unwilling to allow an English garrison to occupy Dunkirk as the price of the Protector's alliance, was doing his best to come to terms with Spain, which would have enabled him to dispense with English aid. It was not till the approach of autumn that the French Minister, discovering that his overtures to Philip IV. had been made in vain, bowed to the inevitable, and agreed to hand over Dunkirk to England, if it could be wrested from Spain by the united effort of the two countries. What a vista was opened up of vast military and naval expenditure by the mere enunciation of such a project! The reduction of the army in the summer of 1655 could hardly be maintained under these altered circumstances; and with an increased army and navy, what chance was there for that government according to the Instrument which had been the corner-stone of Oliver's domestic policy?