Patrol vs Unpatrolled - What's the difference?

patrol | unpatrolled |

As a noun patrol

is (military) a going of the rounds along the chain of sentinels and between the posts, by a guard, usually consisting of three or four men, to insure greater security from attacks on the outposts.

As a verb patrol

is to go the rounds along a chain of sentinels; to traverse a police district or beat.

As an adjective unpatrolled is

not patrolled.