Peter H. Allabach
Peter Hollingshead Allabach was an officer in the Union Army during the American Civil War.
Allabach was born in WilkesBarre, Pennsylvania and attended the academy there. At the age of 20, he enlisted in Company E, 3rd U.S. Infantry for five years. During his service in the MexicanAmerican War, he participated in every battle his regiment was in, including the Battle of Vera Cruz, the Battle of Chapultepec, and at the Battle of Contreras, he is noted as planting the first flag in the enemy camp. The only conflict he did not participate in was the battle of Buena Vista. He was promoted to sergeant within six months of enlisting and was discharged on November 25, 1849, when his term of service expired.
Source: Wikipedia