He was mustered out on July 31, 1861, but a month later rejoined the fight to preserve the Union, when on September 2, he re-enlisted as a Sergeant in Company F, 7th New Jersey Volunteer Infantry. He fought in the 1862 Peninsular Campaign, participating in the Battles of Williamsburg, Fair Oaks, and the Seven Days Battle. When 2nd Lieutenant Adolph Chazzote was killed in action in the June 25, 1862 Battle of Oak Grove, Edward Dingler became the acting 2nd Lieutenant of his Company. On July 29, 1862 his acting status became permanent, receiving a commission of 2nd Lieutenant on that date. After fighting in the 2nd Battle of Bull Run and in the Antietam Campaign, he was advanced to 1st Lieutenant on November 24, 1862. Through the December 1862 Fredericksburg Campaign through the May 1863 Chancellorsville Campaign he was his Company's second in command, and played a prominent role at Chancellorsville. When Company F commander Captain Alpheus Witherell sustained a severe wound, Edward Dingler took command of the unit. When Captain Witherell died of his wounds in August, Lieutenant Dingler was promoted to that rank. He served with conspicuous bravery in the 1864 Overland Campaign, and the Siege of Petersburg. When his enlistment expired in October 1864, he was honorably discharged, have served three years in the field.
He was mustered out on July 31, 1861, but a month later rejoined the fight to preserve the Union, when on September 2, he re-enlisted as a Sergeant in Company F, 7th New Jersey Volunteer Infantry. He fought in the 1862 Peninsular Campaign, participating in the Battles of Williamsburg, Fair Oaks, and the Seven Days Battle. When 2nd Lieutenant Adolph Chazzote was killed in action in the June 25, 1862 Battle of Oak Grove, Edward Dingler became the acting 2nd Lieutenant of his Company. On July 29, 1862 his acting status became permanent, receiving a commission of 2nd Lieutenant on that date. After fighting in the 2nd Battle of Bull Run and in the Antietam Campaign, he was advanced to 1st Lieutenant on November 24, 1862. Through the December 1862 Fredericksburg Campaign through the May 1863 Chancellorsville Campaign he was his Company's second in command, and played a prominent role at Chancellorsville. When Company F commander Captain Alpheus Witherell sustained a severe wound, Edward Dingler took command of the unit. When Captain Witherell died of his wounds in August, Lieutenant Dingler was promoted to that rank. He served with conspicuous bravery in the 1864 Overland Campaign, and the Siege of Petersburg. When his enlistment expired in October 1864, he was honorably discharged, have served three years in the field.