John Peter Brindle was born on April 8, 1825, in Pennsylvania to George and Elizabeth Brindle. His father was a farmer who owned $9,000 of real estate in 1850. The family lived in Unity, Pennsylvania, until the 1830s, when they moved to Green, Pennsylvania. By 1850, Brindle was living in North Middleton, Pennsylvania, and working as a farmer.
He married Amanda Cornman on May 9, 1850, and they had at least five children: Charles, born around 1852; Edward, born around 1856; Oliver, born around 1857; Jane, born around 1859; and Minnie, born around 1865. By 1860, he was working as a carpenter in Middlesex, Pennsylvania, and he owned $500 of personal property.
On October 3, 1862, he received a commission as a 1st lieutenant in Company G of the 84th Pennsylvania Infantry. The regiment took part in the Battle of Fredericksburg, the Battle of Chancellorsville, and the Overland Campaign. In March 1863, he wrote that he “should like to see [African Americans] all put to work on the entrenchments and teaming, and let the men do the fighting for I would place but little confidence in a Negro Reg[iment].”
He remained devoted to the Union, observing that soldiers who reenlisted in the winter of 1863-64 were “showing that men are determined to put down this reblion [sic].” He was promoted to captain on August 15, 1863. He contracted typhoid fever in the spring of 1864, and he resigned on June 30, 1864.
He settled in Carlisle, Pennsylvania, after the war, and by 1870, he owned $2,300 of real estate and $4,300 of personal property. He became a prominent member of the Carlisle community and one of the town’s “leading contractors.” As a local writer observed, he was a “public spirited citizen, always having at heart the welfare of the community.” He supported the Democratic Party and served several terms as justice of the peace. He died of heart failure in Carlisle on March 12, 1900, while reading a morning newspaper.