English: Crest of USS O'Bannon, DD-987. Blue and Gold are the colors traditionally associated with the U.S. Navy and both are symbolic of the Navy's element, the sea and it's goal of excellence. The Shield symbolizes an event in 1805 during the Tripolitan War when LT Presley O'Bannon (USMC), at the head of an escort of seven Marines and one midshipman, stormed the fort at Derna in present day Libya. This fort is represented by the embattled partition line. With his own hands, O'Bannon hoisted an American Flag over a captured position for the first time in the history of the US. At Malta, according to tradition, Hamet presented O'Bannon with the jeweled sword he carried while a refugee with the Mameluke in Egypt. This type of blade, known as a Mameluke sword, is worn by Marine Officers today and is the oldest weapon in continuous use by the Armed Forces of the United States. On his return home, O'Bannon was presented a second sword, this time a ceremonial one, by his native state of Virginia. The crossed sword and cutlass on the shield have been adopted from the Enlisted and Officers surface warfare badges and represent the two swords presented O'Bannon as well as the mission, capabilities, and personnel of the Spruance Class Destroyer. Three shamrocks refer not only to the O'Bannon's Irish heritage, but also the three ships to bear this name DD 177, DD/DDE 450 and DD 987. The globe and the anchor, adapted from a USMC seal, are direct references to Presley O'Bannon's outstanding service in the USMC.