The Omaha (LCS 12) is the sixth ship in the Independence-class littoral combat ships and the fourth ship in the U.S. Navy named for the largest city in Nebraska.

February 18, 2015 The keel authentication ceremony for the LCS 12 was held at the Austal USA Shipyard in Mobile, Ala.

November 19, The Pre-Commissioning Unit (PCU) Omaha exited the assembly bay #4 at Austal's facility for the first time and was transported down river, while sitting on a deck barge, to BAE Systems Southeast Shipyard's floating dry-dock; Launched on Nov. 20.

December 19, PCU Omaha was christened during a 10 a.m. CST ceremony at Austal USA Shipyard in Mobile, Alabama. Ms. Susan A. Buffett, an Omaha philanthropist and daughter of Warren E. Buffett, chairman and chief executive of Berkshire Hathaway Inc., served as sponsor of the ship. Cmdr. Matthew D. Scarlett (LCS Crew 206) is the prospective commanding officer.

January 12, 2017 LCS 12 is currently moored at Austal USA Shipyard's Vessel Completion Yard, at the northern tip of Pinto Island; Underway for Builder's (Alpha) trials from March 22-24; Underway for Bravo trials from April 22-23; Underway for acceptance trials with the INSURV from May 10-11.

September 6, Austal USA, Mobile, Alabama, was awarded $12,3 million for cost-plus-award-fee delivery order 7F18 against previously awarded basic ordering agreement N00024-15-G-2304 to provide engineering and management services for advance planning and design in support of the USS Omaha's Post Shakedown Availability (PSA). Work is expected to be completed by August 2018.

September 7, The Omaha moored at Austal USA Shipyard's Vessel Completion Yard after a one-day underway off the coast of Mobile.

September 15, U.S. Navy accepted delivery of the Pre-Commissioning Unit (PCU) Omaha during a short ceremony aboard the ship.

November 9, The littoral combat ship departed Vessel Completion Yard for a one-day underway off the coast of Mobile; Underway en route to San Diego, Calif., on Nov. 20.

November 24, PCU Omaha (Crew 213) moored at Wharf D2 on Naval Station Mayport, Fla., for a five-day port call; Moored at Berth 6, Pier 10 on Naval Station Norfolk from Dec. 1-6; Moored at Berth 1, Pier 10 from Dec. ?-30.

January 3, 2018 The Omaha moored at Pier A on Naval Station Guantanamo Bay, Cuba, for a three-day port call; Moored at Pier 16 in Port of Cristobal, Panama, for an overnight stop to refuel on Jan. 8; Transited the Panama Canal on Jan. 9; Moored at Cruise Pier in Port of Manzanillo, Mexico, for a brief stop to refuel on Jan. 15.

January 19, The Pre-Commissioning Unit (PCU) Omaha, commanded by Cmdr. Michael H. Toth, moored at Berth 6, Pier 4 in its homeport of Naval Base San Diego, for the first time, after a 20-day transit from Norfolk; Moored at Berth 1, Broadway Pier in downtown San Diego, in preparation for its commissioning ceremony, on Jan. 31.

February 3, USS Omaha was commissioned during a noon PDT ceremony in Port of San Diego.

February 5, The Omaha moored at Navy Fuel Farm (NFF) on Naval Base Point Loma for a brief stop to refuel before returned to Naval Base San Diego; Moored at Bravo Pier, Naval Air Station North Island for a brief stop to onload ammo before underway for routine training on Feb. 26; Returned home on March 9.

March 30, LCS 12 moored at Berth 6, Pier 4 on Naval Base San Diego after a four-day underway in the SOCAL Op. Area; Underway again from April 25-30; Underway for Combat Systems Ship’s Qualification Trials (CSSQT), at the Point Mugu Test Range, from May 23-25; Day-long underway on June 6; Day-long underway for Final Contract Trials (FCT) with the INSURV on June 20.

June 25, USS Omaha moored at Bravo Pier for a brief stop to offload ammunition before underway off the coast of southern California; Returned home on June 26; Entered the Pride of San Diego Dry Dock on July ?.

November 2?, USS Omaha moved "dead-stick" from BAE Systems shipyard to Berth 6, Pier 4 on Naval Base San Diego.

December 7, Cmdr. John P. Barrientos relieved Cmdr. Michael H. Toth as CO of the LCS Crew 213 (Blue) during a change-of-command ceremony on board the Omaha.

May 7, 2019 USS Omaha departed homeport for sea trials following a 10-month Post Shakedown Availability (PSA); Anchored at Coronado's Anchorage A-148 for an overnight stop on Tuesday evening; Moored at Berth 6, Pier 5 on May 9; Underway again on June 10; Moored at NFF for a brief stop to refuel on June 14.

June 20, The Omaha (Crew 212), commanded by Cmdr. David W. Walton, Jr., made a brief stop at Bravo Pier to onload ammo before moored at Berth 2, Pier 5 on Naval Base San Diego; Underway again from July 9-19 and July 31; Moored at NFF for a brief stop to refuel before returned home on Aug. 1.

September 24, USS Omaha moored at Berth 6, Pier 4 after a brief underway off the coast of San Diego; Day-long underway on Sept. 26; Underway again from Sept. 30- Oct. 3 and Oct. 7; Moored at NFF for a brief stop to refuel on Oct. 9; Moored at Bravo Pier for a brief stop to onload ammo on Oct. 10; Returned home on Oct. 11.

November 14, The Omaha moored at Berth 6, Pier 4 on Naval Base San Diego after a 10-day underway in the SOCAL Op. Area; Underway again from Nov. 29- Dec. 3 and Dec. 7.

December 11, The littoral combat ship moored at Bravo Pier, NAS North Island for a brief stop to onload ammo; Moored at Berth 6, Pier 5 on Dec. 13; Underway in support of the USS Nimitz (CVN 68) CSG's Group Sail on Jan. 13.

January 21, 2020 USS Omaha moored at Bravo Pier, NAS North Island for a brief stop to onload ammunition; Brief stop at Bravo Pier again on Jan. 28; Returned home on Feb. 2; Moored at NFF for a brief stop to refuel before underway again on Feb. 4.

February 7, The Omaha moored at Berth 6, Pier 5 on Naval Base San Diego; Underway again from March 3-6 and April 6-10.

May 22, USS Omaha moored at Berth 2, Pier 5 on Naval Base San Diego after a 25-day underway in the SOCAL Op. Area; Underway again from July 6-10.

July 24, USS Omaha moored at Berth 6, Pier 4 on Naval Base San Diego after a three-day underway for routine training; Underway again from Sept. 10-11.

September 24, The Omaha moored at Berth 1, Pier 4 on Naval Base San Diego after a three-day underway off the coast of southern California.

October 1, Cmdr. Michael E. Piano relieved Cmdr. Dustin T. Lonero as CO of the LCS 10 (Blue) during a change-of-command ceremony on board the Omaha.

October 2, USS Omaha departed Naval Base San Diego for routine training off the coast of southern California; Moored at Bravo Pier for a brief stop to onload ammo on Oct. 6; Moored at Berth 1, Pier 5 on Oct. 8; Brief underway on Oct. 14; Underway again from Oct. 15-16; Underway in support of amphibious landing exercise Steel Knight/Dawn Blitz 21 from Dec. 3-11.

January 29, 2021 USS Omaha moored at Berth 1, Pier 5 on Naval Base San Diego after a two-day underway in the SOCAL Op. Area; Underway again on April 5.

April 6, The Omaha conducted Surface Ship Radiated Noise Measurement (SSRNM) testing, off the northeast coast of San Clemente Island; Brief stop at Bravo Pier to onload ammo before returned home on April 8; Underway in support of the USS Essex (LHD 2) ARG's COMPTUEX on May 14; Moored at Bravo Pier for a brief stop to onload ammo on May 18; Moored at Berth 6, Pier 4 on May 28.

June 7, USS Omaha moored at Berth 1, Pier 5 on Naval Base San Diego after a six-day underway in the SOCAL Op. Area; Underway again on June 24; Moored at Bravo Pier for a brief stop to onload ammo on July 1; Moored at Quay Wall 3 on July 6; Underway again on July 9; Moored at NFF for a brief stop to refuel on July 12; Moored at Berth 2, Pier 5 on July 16.

August 16, USS Omaha moored at Berth 6, Pier 5 on Naval Base San Diego after a 13-day underway in support of Large Scale Exercise (LSE) 2021; Underway again on Aug. 23; Moored at Bravo Pier for a brief stop to onload ammo on Aug. 24; Returned home on Aug. 26; Underway again from Oct. 13-14 and Jan. 6.

January 10, 2022 The Omaha (Gold - LCS Crew 209) moored at Berth 1, Alpha Pier on Naval Station Everett, Washington; Underway en route to Seattle on Feb. 21; Moored pierside at Vigor Shipyards, for a Drydocking Selected Restricted Availability (DSRA), on Feb. 22; Entered the Dry Dock Evolution on March ?.

Ocxtober 2?, The Rotational LCS Crew 208 (Blue) assumed command of the Omaha during a crew exchange ceremony on board the ship.

January 16, 2023 USS Omaha departed Vigor Shipyards for sea trials in the Strait of Juan de Fuca; Moored at Berth 5, Delta Pier on Naval Base Kitsap-Bremerton from Jan. 18-19; Moored at North Mole Pier in Naval Base San Diego on Jan. 23.

June 8, Cmdr. Christopher D. Caraway relieved Cmdr. Joseph Bubulka as CO of the LCS Crew 208 during a change-of-command ceremony on board the Omaha.

September 12, USS Omaha (Blue) departed homeport for sea trials off the coast of southern California; Moored at North Mole Pier, after suffered an engineering casualty, on Sept. 13; Moved to Berth 6, Pier 5 on Oct. 26.

February 5, 2024 USS Omaha (Gold) moored at Berth 6, Pier 5 on Naval Base San Diego after a two-day underway in the SOCAL Op. Area; Underway again from Feb. 7-10.

April 2, Cmdr. Kevin Smith relieved Cmdr. Ben E. Nehrke as CO of the LCS Crew 209 during a change-of-command ceremony on board the Omaha.

April 24, USS Omaha moored at Berth 6, Pier 5 on Naval Base San Diego, around 6:20 p.m., after suffered an engineering casualty shortly after underway at 5 p.m. local time.