The Delaware (SSN 791) is the 18th Virginia-class attack submarine and the seventh United States Navy ship named for the State of Delaware. The contract to build her was awarded to Northrop Grumman Newport News Shipbuilding on Dec. 22, 2008 and construction began in September 2013.

April 30, 2016 The keel was laid down for the future USS Delaware during a ceremony at Newport News shipyard.

October 20, 2018 The Pre-Commissioning Unit (PCU) Delaware was christened during a 10 a.m. EDT ceremony at the Huntington Ingalls Industries (HII) Newport News Shipbuilding in Newport News, Virginia. Dr. Jill T. Biden, the former second lady of the United States, served as sponsor of the ship. Cmdr. Brian P. Hogan is the prospective commanding officer.

December 12, PCU Delaware moved from the Module Outfitting Facility (MOF) Bay #4W to a floating dry-dock; Launched on Dec. 14.

August 30, 2019 The Delaware moored at Pier 6 on Newport News Shpyard after underway for the first time to conduct Alpha sea trials; Underway for Bravo trials from Aug. 31- Sept. 8; Underway for acceptance trials on Oct. 1.

October 7, SSN 791 made a brief stop off Naval Station Norfolk for personnel transfer; Moored at Pier 6, Newport News Shipyard on Oct. 9; Moved to Berth 5, Pier 3 in Naval Station Norfolk on Oct. 24.

October 25, Huntington Ingalls Industries (HII) Newport News Shipbuilding officially delivered the PCU Delaware to U.S. Navy.

November 8, Cmdr. Matthew Horton relieved Capt. Brian P. Hogan as CO of the Delaware during a change-of-command ceremony on board the sub.

November 26, PCU Delaware moored at Berth 2, Pier 14 on Naval Station Norfolk after a two-week underway for routine operations; Moved to Berth 2, Pier 3 on Dec. 9; Underway again on March 20.

April 4, 2020 USS Delaware was officially commissioned without a ceremony while undersea. The commissioning was previously scheduled to happen in Port of Wilmington, Del., but was cancelled for public health safety and due to restrictions on large public gatherings.

April 23, The Delaware moored at Berth 2, Pier 14 on Naval Station Norfolk; Underway again on May 18; Brief stop off Naval Station Norfolk for personnel transfer on May 19.

May 22, USS Delaware moored at Trident Wharf in Port Canaveral, Fla., for a 10-day port call; Moored at Wharf C2 on Naval Station Mayport from June 15-19; Moored at Warrior Wharf on Naval Submarine Base Kings Bay, in preparation for magnetic treatment (DEPERM), on June 20; Underway for degaussing runs on June 22; Conducted acoustic trials off the coast of Port Everglades, Fla., from June 25-27 and June 29- July 2.

July 6, The Delaware moored at Pier 12N on Naval Submarine Base New London in Groton, Connecticut; Moved to Electric Boat shipyard for a Post Shakedown Availability (PSA) on July 15; Entered the Graving Dock #1 on July ?.

October 30, General Dynamics Electric Boat was awarded a $10,2 million modification to a previously awarded contract (N00024-09-C-2104) for the execution of USS Delaware's guaranty period. Work is expected to be completed by July 2021; Another $15 million modification was awarded on March 8, 2021.

September 26, 2021 USS Delaware made a brief stop off the coast of Groton for personnel transfer while underway for sea trials; Moored at Pier 32S in Naval Submarine Base New London on Oct. 1; Underway again on Oct. 20.

November 1, The Delaware moored at Trident Wharf in Port Canaveral, Fla., for a brief stop; Brief stop off Groton for personnel transfer on Nov. 5; Moored at Pier 6N on Nov. 8; Underway again on Nov. 29; Moored at Pier 17S on Dec. 17.

January 10, 2022 USS Delaware departed homeport for routine operations; Brief stop off Groton for personnel transfer on Jan. 14, Jan. 18, Feb. 4, 8 and 14th; Moored at Pier 31S on Feb. 17; Underway again on March 26.

March 29, USS Delaware moored at Auto & RoRo Berth in Port of Wilmington, Del., for a six-day visit to commemorate its commissioning; Returned home on April 7; Underway again on April 15.

April 24, The Delaware moored at Trident Wharf in Port Canaveral, Fla., for an 11-day port call; Moored at Trident Wharf for a brief stop on May 24; Brief stop off Groton for personnel transfer on May 27 and June 1; Brief stop off Naval Station Norfolk on June 8 and 10th; Moored at Pier 6S in Naval Submarine Base New London on June 13.

July 15, Capt. Thomas P. O’Donnell relieved Capt. Matthew R. Boland as Commander, Submarine Squadron (SUBRON) 12 during a change-of-command ceremony on board the SSN 791.

August 8, USS Delaware moored at Pier 6S on Naval Submarine Base New London after an 11-day underway for Prospective Commanding Officer (PCO) operations.

August 12, Cmdr. Robert Low relieved Cmdr. Matthew Horton as CO of the Delaware during a change-of-command ceremony on board the sub.

August 19, USS Delaware moored at Pier 31N on Naval Submarine Base New London after a four-day underway for routine operations; Underway again on Sept. 13; Moored at Pier 17N on Sept. 29; Underway again from Nov. 5-10 and Nov. 28.

December 2, USS Delaware moored at Shearwater Jetty on Canadian Forces Base (CFB) Halifax, Nova Scotia, for a four-day port visit; Brief stop off Groton for personnel transfer on Dec. 9; Returned home on Dec. 12; Underway again on Jan. 18.

January 22, 2023 The Delaware made a brief stop off the coast of Groton for personnel transfer; Brief stop off Groton again on Jan. 26 and 30th; Moored at Pier 17N on Feb. 3.

February 13, USS Delaware departed Groton for its maiden North Atlantic deployment.

From March 3-4, the Delaware conducted operations off the east coast of Reinoya Island, Norway.