Iran’s Supreme Leader Ayatollah Mojtaba Khamenei issued decrees on Monday appointing six senior military commanders, including successors to four commanders who were killed in Israeli-US attacks.

Ali Abdollahi was appointed chief of staff of the Armed Forces, succeeding Abdolrahim Mousavi, while Ahmad Vahidi was named commander-in-chief of the Islamic Revolutionary Guard Corps (IRGC), succeeding Mohammad Pakpour, The Caspian Post reports, citing Anadolu Agency.

In separate decrees, Kioumars Heydari was appointed deputy chief of staff of the Armed Forces, while Mostafa Izadi was named deputy commander-in-chief of the IRGC.

Khamenei also appointed Ali Azmaei as commander of the IRGC Navy, succeeding the slain Alireza Tangsiri.

Hossein Taeb was appointed head of the IRGC’s Basij Organization, succeeding the slain Gholamreza Soleimani.

In the decrees, Khamenei called for the “continuous and comprehensive development” of military capabilities to achieve “maximum deterrence,” as well as readiness to conduct “powerful offensive operations against the enemy.”

He also ordered the enhancement of the Armed Forces’ and Basij’s “comprehensive and up-to-date defense and security capabilities” and called for an effective response to all levels of conventional, modern, cognitive and hybrid military threats.

Khamenei further called for the completion of the integration of the Armed Forces General Staff and the Khatam al-Anbiya Central Headquarters, based on directives issued by the late supreme leader.

Iran has been engaged in military conflict with Washington since the United States and Israel launched a joint offensive against Tehran in February, fueling regional tensions. Tehran retaliated with attacks targeting regional countries that host US military assets.

Iran and the United States agreed to a ceasefire in April and subsequently signed a memorandum of understanding in June aimed at ending their military conflict and reaching a lasting peace agreement.

The agreement, however, collapsed last month, with Tehran and Washington exchanging attacks for nearly two weeks before US President Donald Trump abruptly halted the bombardment amid reports of talks aimed at resolving the conflict.