Feb. 12, 1892 Suggsville Clarke County Alabama, USA
Enlisted in the Confederate States Army on 27 September 1861 in Montgomery, Alabama. He was a 1st Lieutenant in Company K, 23rd Alabama Infantry.
Malachiah and his two brothers, William Rufus Cobb & Zeno Cobb served together in the 23rd Alabama Regiment. Mal took care of William's belongings when William died at Chattanooga in May of 1862. He made sure his brother's body was returned to Clarke County for burial in the Old Salem Cemetery. Malachiah and his brother Zeno were captured at Vicksburg on 8 July 1863 and taken prisoner.