Nuclear Tensions Escalate: Russia and US Announce Major Weapons Developments

A series of announcements and military exercises regarding nuclear-capable weapon systems from Russia and the United States have heightened global focus on nuclear arms. These developments follow a period of escalating geopolitical tensions and the expiration of a key nuclear arms control treaty.

Russian Military Exercises and Weapon Tests

Nuclear Force Maneuvers

Russia commenced three-day nuclear force maneuvers on Tuesday, involving practice launches of nuclear-capable ballistic and cruise missiles. The Russian Defense Ministry stated the exercise includes 64,000 troops, over 200 missile launchers, more than 140 aircraft, 73 surface warships, and 13 submarines, eight of which are armed with nuclear-tipped intercontinental ballistic missiles (ICBMs).

The drills are focused on the "preparation and use of nuclear forces under the threat of aggression." The exercises involve cooperation with Belarus, which hosts Russian nuclear weapons, including the Oreshnik intermediate-range missile system.

Sarmat ICBM

Russia conducted a test launch of the new Sarmat ICBM. President Vladimir Putin stated the missile would enter combat service by the end of the year. The Sarmat is designed to replace the aging Soviet-built Voyevoda missile.

Putin described the Sarmat as "the most powerful missile in the world" and claimed its combined warhead power exceeds that of any Western counterpart by more than four times.

He also noted the missile has higher precision than its predecessor and is capable of suborbital flight with a range exceeding 35,000 kilometers. The Sarmat development began in 2011; prior to this test, it had one known successful test and reportedly suffered a failure in 2024.

Burevestnik and Poseidon Systems

President Putin announced Russia had tested a new weapon on Wednesday, specifically referencing the Burevestnik, a nuclear-powered cruise missile. He described it as a "unique product, unmatched in the world." Moscow had previously announced a test of this missile, which it described as having "unlimited-range."

Putin also highlighted the Poseidon, a nuclear-powered, nuclear-capable underwater drone, stating, "There is nothing like this." In 2018, Russian media reported the Poseidon would be capable of achieving a speed of 200km/h (120mph) and traveling in a "constantly changing route." A senior Russian MP stated this drone could "put entire states out of operation."

Technical challenges: In 2019, an explosion that killed five Russian nuclear engineers was linked to the Burevestnik by some Russian and Western experts. The International Institute of Strategic Studies (IISS) stated in 2021 that Russia faced "considerable technical challenges" in ensuring "the reliable performance of the nuclear-propulsion unit" of the missile.

United States Announcements

Nuclear Weapons Testing

President Donald Trump announced on his Truth Social platform that he instructed the "Department of War" to begin testing nuclear weapons "on an equal basis," citing testing programs by other countries. He indicated this process would "begin immediately" and that nuclear test sites would be determined later.

The White House has not clarified whether this refers to nuclear warheads or delivery systems. This would potentially be the first US nuclear test in 33 years, with resumption expected to take several months.

Historical Context

Nuclear-armed states regularly test nuclear weapon delivery systems. North Korea is the only nation to have tested an actual nuclear weapon since the 1990s, with its last test occurring in 2017.

Context and Expert Perspectives

Geopolitical Background

The announcements come following shifts in US-Russia diplomatic efforts regarding Ukraine. A planned summit between President Trump and Putin was cancelled after US Secretary of State Marco Rubio reportedly concluded that differences between Moscow and Washington were too significant for a high-level meeting to yield results. Subsequently, the US imposed sanctions on two Russian oil producers, citing Moscow's failure to agree on a peace deal in Ukraine.

President Putin has frequently referenced Russia's nuclear arsenal since the February 2022 invasion of Ukraine. In 2024, Putin revised the nuclear doctrine, stating that a conventional attack on Russia supported by a nuclear power would be considered a joint attack, which lowered the threshold for possible nuclear use.

Expert Analysis

Six policy experts interviewed by the BBC discussed the implications of potential nuclear weapons testing.

• Jamie Kwong, a fellow at the Carnegie Endowment for International Peace, expressed concern that such testing could initiate a "domino effect" among nuclear-armed states, given the decades without such tests (excluding North Korea). Kwong stated the US, Russia, and China are potentially entering a period that could become an arms race.

• Darya Dolzikova, Senior Research Fellow at the Royal United Services Institute (Rusi), indicated that Trump's comments would significantly alter the situation. She stated that other global dynamics have raised the risks of nuclear exchange and proliferation to levels not seen in decades. Dolzikova described Trump's message as "a drop in a much larger bucket," with concerns about that "bucket overfilling."

• David Heathcote, head of intelligence at McKenzie Intelligence Services, suggested the Russian announcements could be viewed in the context of Russia's conventional forces given the ongoing conflict in Ukraine.

• Christopher Egerton of the Institute for Strategic Studies (IIS) suggested Trump's decision was likely a direct response to Russia's Burevestnik test, potentially leading to US flight tests of Intercontinental Ballistic Missiles.

• Mark Galeotti, a Russia scholar, characterized both the Poseidon and Burevestnik as second-strike, retaliatory systems.

International Reactions

Dmitry Peskov, Putin's spokesman, responded to Trump's announcement by questioning whether the US president had been correctly informed, stating that the Russian tests "cannot in any way be interpreted as a nuclear test."

Current Global Nuclear Environment

Experts identified escalating conflicts involving nuclear powers as contributing to global tensions, including:

• The war in Ukraine
• Flare-ups between Pakistan and India
• Actions involving Israel and Iran
• Tensions on the Korean peninsula
• China's ambitions in Taiwan

Arms Control Status

The last nuclear arms treaty between Russia and the US, which limited deployed nuclear arsenals, expired in February, leaving no binding caps on the two largest nuclear arsenals for the first time in over 50 years.