On Tuesday, Russia launched an Iranian surveillance satellite into space, which the Islamic Republic will undoubtedly use to increase the precision of its military operations against its enemies. The launch is one of many indications that the longstanding alliance between Moscow and Tehran has been growing stronger and deeper since the Kremlin’s escalation in Ukraine in February. Nicholas Carl, Kitaneh Fitzpatrick, and Katherine Lawlor write:

Presidents Vladimir Putin and Ebrahim Raisi have spoken at least four times since the invasion began—more than either individual has engaged most other world leaders. Putin visited Tehran in July 2022, marking his first foreign travel outside the territory of the former Soviet Union since the war began. These interactions reflect a deepening and potentially more balanced relationship wherein Russia is no longer the dominant party. This partnership will likely challenge U.S. and allied interests in Europe, the Middle East, and around the globe.

Tehran has traditionally sought to purchase military technologies from Moscow rather than the inverse. The Kremlin fielding Iranian drones in Ukraine will showcase these platforms to other potential international buyers, further benefitting Iran. Furthermore, Russia has previously tried to limit Iranian influence in Syria but is now enabling its expansion.

Deepening Russo-Iranian ties will almost certainly threaten U.S. and allied interests in Europe, the Middle East, and around the globe. Iranian material support to Russia may help the Kremlin achieve some of its military objectives in Ukraine and eastern Europe. Russian support of Iran’s nascent military space program and air force could improve Iranian targeting and increase the threat it poses to the U.S. and its partners in the Middle East. Growing Iranian control and influence in Syria will enable the Islamic Revolutionary Guard Corps [to use its forces in that country] to threaten U.S. military bases in the Middle East and our regional partners, such as Israel and Turkey, more effectively. Finally, Moscow and Tehran will likely leverage their deepening economic ties to mitigate U.S. sanctions.

Surveying news websites and social media on Sunday morning, I immediately found some intelligent and well-informed observers arguing that Iran deliberately warned the U.S. of its pending assault on Israel, and calibrated it so that there would be few casualties and minimal destructiveness, thus hoping to avoid major retaliation. In other words, this massive barrage was a face-saving gesture by the ayatollahs. Others disagreed. Brian Carter and Frederick W. Kagan put the issue to rest:

The Iranian April 13 missile-drone attack on Israel was very likely intended to cause significant damage below the threshold that would trigger a massive Israeli response. The attack was designed to succeed, not to fail. The strike package was modeled on those the Russians have used repeatedly against Ukraine to great effect. The attack caused more limited damage than intended likely because the Iranians underestimated the tremendous advantages Israel has in defending against such strikes compared with Ukraine.

But that isn’t to say that Tehran achieved nothing:

The lessons that Iran will draw from this attack will allow it to build more successful strike packages in the future. The attack probably helped Iran identify the relative strengths and weaknesses of the Israeli air-defense system. Iran will likely also share the lessons it learned in this attack with Russia.

Iran’s ability to penetrate Israeli air defenses with even a small number of large ballistic missiles presents serious security concerns for Israel. The only Iranian missiles that got through hit an Israeli military base, limiting the damage, but a future strike in which several ballistic missiles penetrate Israeli air defenses and hit Tel Aviv or Haifa could cause significant civilian casualties and damage to civilian infrastructure, including ports and energy. . . . Israel and its partners should not emerge from this successful defense with any sense of complacency.