Rangers served in the 17th and 18th-century wars between American colonists and Native American tribes. The English regulars were unaccustomed to frontier warfare and so Ranger companies were developed. Rangers were full-time soldiers employed by colonial governments to patrol between fixed frontier fortifications in reconnaissance providing early warning of raids. In offensive operations, they were scouts and guides, locating villages and other targets for taskforces drawn from the militia or other colonial troops. In Colonial America, "The earliest mention of Ranger operations comes from Capt. John "Samuel" Smith," who wrote in 1622, "When I had ten men able to go abroad, our common wealth was very strong: with such a number I ranged that unknown country 14 weeks." Robert Black also stated that,