Israel Deploys New Ro’em SIGMA 155mm Howitzer in Combat for First Time Against Hezbollah in Lebanon.

Israel has used the new Ro’em self-propelled howitzer in combat for the first time during artillery strikes in southern Lebanon, introducing longer-range and faster-response firepower against Hezbollah positions. The deployment signals a shift toward more precise and survivable artillery in high-intensity operations.

The Ro’em (SIGMA 155) struck rocket and anti-tank launch sites while delivering a higher rate of fire and extended range than legacy systems. This performance strengthens Israel’s ability to suppress dispersed threats and supports the ongoing replacement of aging M109 howitzers with more mobile and responsive artillery systems.

Related Topic: Elbit America presents new Sigma howitzer to US Army for striking targets up to 80 km away

Ro’em (SIGMA 155) self-propelled howitzer of the Israeli Defense Forces fires its first operational mission in southern Lebanon, delivering high-rate, long-range artillery strikes against Hezbollah launch positions while demonstrating enhanced mobility and automated firepower. (Picture source: Emanuel Maniie Fabian X account)

According to the IDF (Israel Defense Forces), the firing missions took place this week in support of maneuvering ground forces, with the results described as operationally successful. The use of the Ro’em in an active combat zone highlights its readiness for frontline integration and its role in enhancing Israel’s deep fire support and counter-battery capabilities against irregular and hybrid threats.

The Ro’em or SIGMA, developed as part of Israel’s broader artillery modernization program, is designed to replace legacy M109 self-propelled howitzers that have been in service for decades. Built on a wheeled 10x10 chassis rather than traditional tracked platforms, the system provides significantly improved strategic and tactical mobility, allowing rapid repositioning across varied terrain and reducing vulnerability to counterfire. This mobility is particularly relevant in the complex topography of southern Lebanon, where shoot-and-scoot tactics are critical for survivability against Hezbollah’s surveillance and precision strike capabilities.

What is the SIGMA 155 (Ro’em)? Inside Israel’s next-generation 155mm self-propelled howitzer delivering automated, high-rate, long-range firepower and reshaping battlefield artillery operations.

At the core of the Ro’em system is a fully automated 155mm/L52 gun with an advanced autoloader, enabling a higher rate of fire compared to the M109. The automation reduces crew workload while increasing sustained fire output, a key factor in high-intensity engagements where rapid suppression of enemy launch sites is essential. The system is also expected to support extended-range munitions, significantly increasing engagement distances and allowing artillery units to strike deeper targets while remaining outside the effective range of many adversary systems.

The integration of advanced fire control systems and digital connectivity allows the Ro’em to operate within Israel’s network-centric warfare architecture. This enables faster target acquisition and engagement cycles by enabling real-time data sharing among UAVs, forward observers, and command units. In the context of operations against Hezbollah, this capability is crucial for engaging time-sensitive targets such as mobile rocket launchers and anti-tank teams that frequently relocate to avoid detection.

The Ro’em program originates from Israel’s decision in the late 2010s to field a next-generation artillery system capable of meeting high-intensity conflict requirements. Developed by Elbit Systems, the SIGMA 155 was selected to replace the M109 fleet following a competitive evaluation emphasizing automation, rate of fire, and lifecycle efficiency. The program progressed through prototype testing and system validation phases before entering low-rate initial production, with the IDF prioritizing rapid fielding to address evolving threats along its northern and southern fronts.

Technically, the Ro’em combines a 155mm/L52 cannon with a fully automated loading and laying system, reducing crew size while maintaining high firing tempo. The system can deliver multiple rounds in quick succession, including simultaneous impact fire missions, and is compatible with a wide range of NATO-standard and precision-guided munitions. Its wheeled configuration enhances road mobility and reduces maintenance demands compared to tracked systems, while onboard digital fire control ensures rapid deployment from halt to fire mission within minutes.

Industrial aspects of the Ro’em program also reflect Israel’s emphasis on domestic defense production and technological independence. The system has been developed with a high degree of local industrial input, ensuring supply chain resilience and the ability to rapidly adapt the platform based on operational feedback. This approach supports continuous software upgrades, targeting systems, and munition integration as battlefield requirements evolve.

The gradual replacement of M109 units with the Ro’em will reshape the IDF Artillery Corps by increasing firepower density, responsiveness, and survivability. While the M109 has undergone multiple upgrades, its limitations in automation, range, and mobility have become increasingly apparent in modern high-threat environments. The transition to the Ro’em signals a shift toward highly mobile, digitally integrated artillery forces capable of operating effectively against both conventional and asymmetric adversaries.

Operational use in Lebanon also provides early validation of the system’s performance under combat conditions. The ability to deliver accurate, high-volume fire against dispersed and concealed targets directly supports maneuver forces and helps suppress enemy indirect fire threats. This enhances force protection and enables greater operational freedom for ground units.

In strategic terms, the introduction of the Ro’em strengthens Israel’s deterrence posture by demonstrating the ability to rapidly neutralize rocket and anti-tank threats, which are central to Hezbollah’s operational doctrine. The system’s extended range and precision also complicate adversary planning by increasing the depth and speed at which Israeli forces can engage critical assets.

As the IDF (Israel Defense Forces) continues to integrate the Ro’em across its artillery units, its impact will extend beyond immediate battlefield performance. It represents a broader shift toward automation, mobility, and network integration in artillery warfare, trends that are increasingly shaping the future of land combat and influencing modernization programs worldwide.

Written by Alain Servaes – Chief Editor, Army Recognition Group
Alain Servaes is a former infantry non-commissioned officer and the founder of Army Recognition. With over 20 years in defense journalism, he provides expert analysis on military equipment, NATO operations, and the global defense industry.