The U.S. Army's Self-Propelled Howitzer Modernization (SPH-M) initiative is set to transform artillery capabilities with advanced systems aimed at increasing lethality, range, and rate of fire. This article covers the Army's selection of five major contractors—American Rheinmetall, BAE Systems, Hanwha Defense USA, General Dynamics, and Elbit Systems USA—each providing innovative solutions for modern self-propelled howitzers. From the K9 Thunder’s mobility and firepower to the ARCHER’s automated loading system, the article explores how these cutting-edge artillery systems align with the Army's requirements for enhanced survivability and mobility. Learn about the K9A2, RCH 155, ATMOS 2000, and more as the U.S. Army moves toward a competitive evaluation phase for the future of artillery modernization, ensuring reliable, high-performance systems to meet evolving combat demands.