In the wake of a tumultuous summer marked by direct conflict with Israel, Iran’s military has taken center stage once again—this time not on the battlefield, but in a show of force at sea. Over August 21 and 22, 2025, the Iranian Navy conducted its largest and most publicized military drill since the end of the 12-day war with Israel in June. The exercise, codenamed “Sustainable Power 1404,” unfolded across the northern Indian Ocean and the Sea of Oman, drawing the attention of both regional powers and Western capitals alike.
According to widespread coverage by major Arab outlets such as Al-Arabiya 24, Al Mayadeen, Al-Manar, and al-Masirah, the two-day drill was designed to showcase Iran’s renewed deterrence capabilities and readiness to counter any future threats. The operation involved an impressive array of naval cruise missiles—including the short-range Nasir, medium-range Qader, and long-range Qadir—launched from both coastal batteries and frontline warships like the IRIS Genaveh missile frigate and the IRIS Sabalan destroyer. Iranian officials reported that these radar-evading, high-precision missiles struck their designated sea targets with remarkable accuracy.
This wasn’t just a display of firepower. The drills incorporated drone operations, electronic warfare exercises, and the full participation of the Navy’s surface and subsurface units, flight teams, and missile sites. As reported by Iran’s state-affiliated media and confirmed by Western outlets like Reuters and Newsweek, the exercises marked a significant escalation in Iran’s efforts to project strength and reassert itself following the devastating June conflict.
The timing and scale of “Sustainable Power 1404” were no accident. As Newsweek noted, the drill comes “at a sensitive moment,” with the ceasefire between Iran and Israel still fragile and tensions simmering just below the surface. The June war, which raged from June 13 to June 24, saw Israeli forces—backed by the United States—launch a series of attacks on Iranian military, nuclear, and civilian infrastructure. Iran responded with a barrage of drones and missiles, including a retaliatory strike on a U.S. base in Qatar under the codename Operation Glad Tidings of Victory. Ultimately, the conflict ended only after both sides suffered heavy losses and agreed to a cessation of hostilities.
Iran’s Defense Minister, Brigadier General Aziz Nasirzadeh, made it clear that the missiles deployed in this latest drill were “significantly more advanced than those used in the recent 12-day war, with a 90% success rate in penetrating enemy defense systems.” His statement, widely cited by Arab and Western media, was echoed by other top military officials who used the occasion of National Defense Industry Day to issue stern warnings to potential adversaries.
Army Chief Major General Amir Hatami, in a message to Nasirzadeh, declared, “The honorable sons of the nation are prepared to punish any malevolent aggressor and deliver a more crushing and regret-inducing response.” He credited Iran’s perceived victory in June to “national unity under the guidance of Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei and the resistance of the Iranian people against an unholy alliance of evildoers.”
Chief of Staff Major General Abdolrahim Mousavi reinforced this message, stressing that “strengthening defense power and deterrence capability is the only way to safeguard the country from external threats.” He cited Iran’s “astonishing” missile power, demonstrated in recent retaliatory strikes, as a key factor that has made enemies realize “adventurism would be met with a very strong slap in the face.”
For the Islamic Revolutionary Guard Corps (IRGC), the message was equally unambiguous. Commander Major General Mohammad Pakpour warned, “Any miscalculation by the enemy will be met with a decisive, swift, and regretful response.” He emphasized that Iran’s strategy of self-reliance and comprehensive power-building has positioned the country “at the peak of its deterrence power.”
The military maneuvers were not limited to the sea. On August 22, Iran temporarily closed large sections of its western airspace from midnight to 6 a.m. local time to accommodate additional missile and drone operations, according to reports from Fars News Agency and other domestic outlets. The closures affected parts of Zanjan, Hamedan, Arak, Yasuj, Iran’s western borders, and the western Persian Gulf. Flights were grounded, and even planes scheduled to depart from Baghdad for Tehran were prevented from taking off during the restrictions. No official explanation was given, but the move underscored heightened security and operational secrecy.
The drills also followed closely on the heels of joint Iran-Russia naval maneuvers in the Caspian Sea—an event that further demonstrated Tehran’s growing military cooperation with Moscow and its efforts to secure its maritime interests.
Western media, including The Washington Post and NBC News, observed that while such exercises are not unusual for Iran, this particular drill was different. As Reuters reported, “Iran launched its first solo military exercise since the June war with Israel. The drill signals Iran’s effort to reassert its image of strength following the conflict with Israel.” The Washington Post noted the symbolic importance: “The ‘Sustainable Power 1404’ drill comes as Iranian officials seek to reassert their strength after a war in which Israel attacked air defenses, bombed nuclear facilities, and struck other sites.”
Iran’s navy, which suffered less direct damage than other branches during the June war, remains the most intact part of the country’s military apparatus. With approximately 18,000 personnel, the navy continues to patrol strategic waterways and has a reputation for seizing or shadowing Western vessels in the region. The recent exercises are thus not only about recovery, but about sending a message: Iran remains a force to be reckoned with, both regionally and globally.
Yet, the saber-rattling comes at a time of renewed international pressure. The E3 countries—France, Germany, and the U.K.—have threatened to trigger the “snapback” mechanism of the Joint Comprehensive Plan of Action, potentially reimposing sanctions on Iran. Iranian Foreign Minister Abbas Araghchi acknowledged that Iran and its allies are “discussing options for enduring any new sanctions,” highlighting the complex interplay between military posturing and diplomatic maneuvering.
As the dust settles on both the June war and the latest round of drills, one thing is clear: Iran is determined to demonstrate that it will not be cowed by external threats or internal setbacks. With its latest naval exercise, Tehran has sent a clear signal to its rivals—and to the world—that it stands ready for whatever comes next.