peninsular (adj.)

"of or pertaining to a peninsula; in the form of a peninsula; carried on in a peninsula," 1610s, from peninsula + -ar or from French péninsulaire (16c.). Related: Peninsularity.

The Peninsular War was the successful military operations in Spain and Portugal 1808-14 by the British and allied local forces, largely under Wellington, to drive the French from the Iberian peninsula. The Peninsular Campaign in the American Civil War was the unsuccessful attempt by the Army of the Potomac, under McClellan, in the spring and early summer of 1862 to capture Richmond, Va., by advancing up the peninsula between the Rappahannock and James rivers.