While Jamestown was an international seaport from the beginning, Virginia was poorly protected by English forces based in Europe across the Atlantic Ocean. For the first 80 years of English settlement, the colonies had to rely primarily upon their own resources to defend themselves against attacks by Native Americans, assault by ships from other countries, or raids by pirates.
England's rise to international power began after William and Mary took the throne in 1688, but a century after Jamestown was founded the mother country still struggled to provide guardships to protect the tobacco fleet in the Chesapeake Bay from pirates. Blackbeard, the most famous pirate, was finally killed through the initiative of the Virginia governor, nor British action, in 1718.
The Jamestown colonists feared attack by the Spanish. They were the first to settle North America; St. Augustine was founded in 1765. The Spanish missed their opportunity to conquer England itself when the Armada was defeated in 1588, but remained a threat to the British colonies in North America.
There was good reason to fear the Spanish. Twice, in 1609 and 1611, King Phillip III of Spain dispatched expeditions to Virginia to spy on the Jamestown colony, and his ambassador in London gathered intelligence as well. Spain feared colonies of other nations north of Florida would become bases for pirates to capture Spanish ships sailing between Central America and Europe.
The 1609 Spanish expedition was chased away from the Virginia coastline by English ships. The spies in the second expedition were captured, rather than welcomed as fellow ocean-crossing European travelers, when they arrived at Fort Algernon at Point Comfort. One spy, Don Diego De Molina, managed to smuggle a letter home that made clear Spain should destroy the English colony before it grew further. He encouraged Phillip III to:1
Spain never attacked the Virginia colony. By the time the English concluded their major Civil War in 1660, rejecting Puritan rule and restoring Charles II to the throne, the Spanish had lost their claims to the Netherlands and Portugal and their potential to expand into North America was lost.
It was the French, more than the Spanish, who challenged English authority most often in North America. The French under Louis XIV finally established a solid financial foundation for funding national expansion and paying for the strongest army in Europe. Had the French king chosen to send more than just a token number of troops to Canada, and treated his colonies there as more than collection warehouses for the fur trade, France might have ended up the dominant military power in North America.
France exported its feudal society to Canada, including the seigneurial system of land distribution where land was surveyed into long, rectangular strips with frontage on a river, bottomland for farming, and uplands for wood supply. In Virginia, land-hungry colonial leaders incorporated as much good farmland as possible in their metes-and-bounds surveys
pattern of land ownership on St. Lawrence River downstream of Montreal still reflects the seigneurial system of New France
Source: ESRI, ArcGIS Online
George Washington carefully surveyed his land claims on the Kanawha River to include the maximum amount of productive bottomland, leaving the less-valuable hills for land claimants who came later
Source: Library of Congress, Eight survey tracts along the Kanawha River, W.Va. showing land granted to George Washington and others
One weakness of French government in Canada was that power was divided between a governor, a Catholic bishop, and an "intendant" responsible for finances and legal activities. France tried to settle Canada by issuing land grants (seignories) comparable to the proprietary colonies of the English, such as Maryland, the Carolinas, and Pennsylvania. The king's friends tried to make their land grants profitable by requiring settlers to pay high fees for renting the land, rather than offering low land costs to maximize settlement and then trying to profit somehow from a growing colonial economy.
The French did try to spur settlement by offering some soldiers stationed in Canada a land grant, rather than shipping them home after the tour of duty had ended. Joseph Coulon de Villiers, sieur de Jumonville, was killed by George Washington's forces in 1754, triggering the French and Indian War - and he was in North America because his grandfather had been a soldier awarded a land grant.2
The French colonies also pre-dated the arrival of the English at Jamestown. In 1605, Samuel de Champlain started a colony at Port Royal, in Acadia. It was a failure in part because Virginians under Samuel Argall destroyed this rival settlement in 1613, but Quebec became a succesful French colonial capital after Champlain founded it in 1608.
In the end, the French were able to explore the North American continent and exploit the fur trade through trade with Native American allies, including territory in the upper Mississippi River that Virginians later captured and organized into Illinois County. However, the French never "adventured" enough money or people to dominate the continent, and withdrew after losing the French and Indian War. Napoleon sold the last major French land claim when another land-hungry Virginian, Thomas Jefferson, purchased the Louisiana Territory for the United States.
The colonies themselves were too weak to supply troops for British imperialism, outside the colony, until the War of of Jenkins Ear in 1739-42. There were five separate conflicts between the English and their European rivals in North America and the Caribbean during the colonial era:
The first three times, the colonial warfare was a reflection of the rivalries for power in Europe; most fighting was on the new England/Canada frontier. The last time, it was Virginia's expansion into French-claimed lands along the Ohio River that triggered the fighting. That war then spread to Europe and even India, becoming the first "world war."
Warfare in colonial Virginia was substantially different from warfare in Europe. It was far harder to raise an army and to supply it on the edge of European civilization. There were surpluses of tobacco and timber in the English colonies, but not of men, clothing, weapons or food. Capture of fortified houses west of the Blue Ridge required little expertise or equipment for siege warfare, but also provided far less plunder than the capture of cities in the dukedoms of Europe.
No Virginia towns were fortified against attack by naval bombardment. The primary role of the British Navy was to protect the tobacco fleet sailing annually to England.
The European colonies on Caribbean islands were prepared to repel such attacks, but Virginia's General Assembly was unwilling to finance forts or a standing army. The main security against foreign attack was the strength of the British navy, financed by residents in Great Britain rather than by direct taxes on the colonies. The size of the military was controlled by Parliament, which was reluctant to approve taxes except in time of war.
There was little need of a European-style army in Tidewater Virginia. The Spanish in Florida were few and far away, as were the French in Canada. The Virginians were not prepared to fight a sustained battle against any army. The Native Americans did not line up in ranks and fire in unison - so why should the Virginians organize according the the European model and fight according to European tactics, when the main threat on the frontier were American Indians?