The 105th fought as a part of the 27th Infantry Division during both World Wars, and was highly decorated for its actions during the Battle of Saipan, where its dogged defense against the largest Japanese Banzai charge of the war decimated its ranks, but prevented the American effort on the island from collapsing. It was consolidated with the 97th Regiment New York Infantry on March 17, 1863, as Companies "F," "G" and " For more information on the history of this unit, see:  Here, 1-105 dug in on the east side of a railroad track that ran north–south about 150 yards west of the beach near the Tanapag plain. The assault troops were also surprised to discover that even though they were approaching the beach at high tide as planned, a miscalculation of the lagoon's depth caused their small boats to go aground, forcing them to walk the final 250 yards (230 m) to the beach in waist-deep water. Companies E, F, and H were recruited from Schenectady.  On 2 July, 1-105 marched at double time across the open ground and dug in at their objective. , The 2nd New York was mustered up again for the Border War in 1916, and was thus prepared for when the US Army mobilized for the First World War in April 1917. During the evening and night of 6 July, the Japanese launched minor probing attacks against the 105th's lines to find weak points, and at 0445 on 7 July, they launched the largest Banzai charge of the war; it is estimated over 4,000 Japanese took part in the charge simultaneously. Once the Battle of Saipan was completed, the 105th Infantry Regiment was assigned to garrison the island from 15–30 July.
105th were posthumously awarded the Congressional Medal of Honor.
 On 31 August 1918, the Ypres-Lys Offensive began in order to force the Germans out from the Dickebusch/Scherpenberg area, and thus reduce the Amiens salient.  On 2 July, 1-105 marched at double time across the open ground and dug in at their objective. On 27 September 1918, 1LT Turner was leading his men in an attack, under terrific artillery and machine-gun fire, after they had become separated from the rest of the company in the darkness. 104th Infantry Regiment Fighting was heavy and the Japanese assault soon overran the perimeter, then the aid station. On 1 July, the 4th Marine Division advanced both north and east toward Marpi Point, the 2nd Marine Division marched up the west coast toward Tanapag, and the 27th Division, along with the 105th Regiment, continued to attack up the center of the island. Its main objective was piercing the Hindenburg Line, an intricate system of German defenses with an average depth of six to eight kilometers. Chaisson, Patrick. PVT Baker received a posthumous Medal of Honor. The 105th Infantry traces its origins to the 2nd New York Volunteer Infantry Regiment, first formed in 1898. B. Lyon Company, 1912. The following day, 18 October, the 105th was on the offensive again, advancing on one of the primary north-south German lines before being halted by strong resistance. 3-105 was a little better off than their two sister battalions, so they were selected to assault the island of Tsugen Shima. The 2nd New York was redesignated as the 105th Infantry Regiment and was assigned to the 53rd Brigade of the 27th Infantry Division. PO Box 2522 D. C. It mustered out July 11, 1865.. Salomon's aid station was set up only 50 yards behind the forward foxhole line on 7 July. CPT Ben L. Salomon was the 105th's regimental dentist officer but on Saipan he was quickly needed as a surgeon. The badly mauled 105th continued operations on Saipan against an enemy that was all but used up, and the island was eventually declared secure on 9 July 1944.  Early on 18 June, the regiment assisted the 165th Infantry Regiment with clearing the island's southern airfield, Aslito Airfield, and took up defensive positions that night on the east of the field. On 17 May 1898, the 2nd New York Infantry was reformed for service in the Spanish–American War. Companies G, I, K, L, and M were recruited from Amsterdam, Malone, Glens Falls, Saratoga Springs, and Gloversville respectively. 27th Division Association There, they trained for combat in the Pacific Theater against the Imperial Japanese Army.
 Nevertheless, the 2nd Regiment lost 32 men, all to disease. came from Hoosick Falls, Whitehall, and Saranac Lake. The regiment swiftly captured a portion of the enemy line at L’Arbe de Guise, holding it against powerful German counterattacks. The 105th Regiment began the campaign by clearing the hilly and well fortified southern point of Saipan, which was later found to have been held by over 1,200 Japanese defenders. Frederick Phisterer.
The 105th landed on Okinawa on 12 April, and moved to the south where they confronted the Shuri Line. Thank you. Companies A, C, and D were recruited from Troy. On 19 October, the regiment again advanced from their forward positions, this time in the face of only slight opposition, and easily took the main German works. The 105th was on Butaritari Island, the principal island of the Makin Atoll on November 20th  On 31 August 1918, the Ypres-Lys Offensive began in order to force the Germans out from the Dickebusch/Scherpenberg area, and thus reduce the Amiens salient. 105th Engineer Combat Battalion. The 105th fought as a part of the 27th Infantry Division during both World Wars, and was highly decorated for its actions during the Battle of Saipan, where its dogged defense against the largest Japanese Banzai charge of the war decimated its ranks, but prevented the American effort on the island from collapsing.