The strategic rationale for upgraded US-Saudi defence ties

The drive for shared prosperity is dependent on security, which is why the Trump administration has made this the main focus of ties

A handout picture provided by the Saudi Royal Palace shows Saudi Crown Prince Mohammed bin Salman (R) welcoming US President Donald Trump (L) upon his arrival in Riyadh on May 13, 2025.
BANDAR AL-JALOUD / Saudi Royal Palace / AFP
A handout picture provided by the Saudi Royal Palace shows Saudi Crown Prince Mohammed bin Salman (R) welcoming US President Donald Trump (L) upon his arrival in Riyadh on May 13, 2025.

The strategic rationale for upgraded US-Saudi defence ties

The headlines of multiple economic and business deals from the three stops on US President Donald Trump’s trip to the Middle East in the opening months of his second administration lend themselves easily to summing it up as Trump’s “spring bling tour.”

However, several important strategic shifts in US policy took place on this trip, and perhaps the biggest and most enduring shift is America and Saudi Arabia doubling down on their bilateral relationship in multiple realms, with expanded ties in energy, health, infrastructure, and new technologies, including artificial intelligence. These two countries are binding their fortunes together in ways that would have been difficult to imagine a decade ago.

As with all presidential visits overseas of this sort, the two main things to watch are the follow-up and implementation of these agreements and how conditions in the region, including the always inevitable unexpected events that come up in the Middle East, will shape the contours of how far this bilateral partnership might go.

Security before prosperity

The Middle East remains a region that is quite volatile—last year saw the first-ever direct military exchanges between Israel and Iran, along with a brutal war between Israel and Hamas in Gaza, and a war between Hezbollah in Lebanon and Israel that devastated lives. Add to it the attacks on global shipping in the Red Sea by the Houthis in Yemen and a chronic threat from terrorist networks like the Islamic State (IS), and that means many uncertainties still exist in the strategic environment.

The drive for shared prosperity is dependent on security, which is why the Trump administration has made it the main focus in its relationship with Saudi Arabia. According to this White House fact sheet, the $142bn in defence sales planned, packaged as part of $600bn in Saudi investments in the United States, is the largest defence sales agreement in history.

REUTERS / Brian Snyder
US President Donald Trump and Saudi Crown Prince and Prime Minister Mohammed Bin Salman exchange a Memorandum of Understanding (MOU) during a ceremony at the Royal Court in Riyadh, Saudi Arabia on May 13, 2025.

If fully implemented, Saudi Arabia would purchase and receive warfighting equipment and services from more than a dozen US defence firms. “This deal represents a significant investment in Saudi Arabia’s defence and regional security, built on American systems and training,” the White House fact sheet states.

The defence sales planned fall into five main categories:

1. Air Force advancement and space capabilities

2. Air and missile defence

3. Maritime and coastal security

4. Border security and land forces modernisation

5. Information and communication systems upgrades

As is usual with defence sales like this, the plan includes extensive training and support for Saudi Arabia’s military, including enhancement of Saudi service academies and military services. The bilateral defence deal outlined is significant, but as some noted, the framework as yet “lacked any specifics,” including possible terms on contracts and delivery timelines.

A package of this size would take years to implement, even if defence sales are expedited, and a lot could happen in the Middle East during those years, given all of the shifting dynamics. One of the shifting dynamics to watch is changes in the global economy and energy markets—all of which could impact Saudi Arabia’s calculus and defence spending plans—its 2025 defence budget is estimated to total $78bn.

Some concerns that will likely come up about a package of this size are the potential risks of technology transfers to adversaries like China and whether any of the sales impact the qualitative military edge Israel seeks to maintain, which is enshrined in US law and policy.

What happens in Palestine, Iran, and Syria will shape the strategic context for the Saudi-US bilateral defence deal

Senate Democratic Leader Chuck Schumer (New York) raised concerns about the Trump administration's announcement, saying Trump would "greenlight the sale of the most sensitive US chip technology in exchange for vague promises of more foreign investment." Schumer will likely be joined by a chorus of others in Congress who have voiced concerns about arms sales to Gulf countries like Saudi Arabia over the past few years. 

The sharp divisions in US politics, combined with the narrow margins between the two parties in both houses of Congress, mean that the old partisan and ideological fights inside America could impact that trajectory and implementation of the package outlined on Trump's trip.

The other thing to watch closely is the strategic rationale and regional context for this security partnership—the Middle East is undergoing major transformations.  It is important to note that the US-Saudi defence package falls short of the treaty-type arrangement Saudi Arabia sought from the United States during the past few years—an effort that Saudi Arabia doubled down on in 2023 after it renewed diplomatic ties with Iran in a deal famously announced by China in March of that year.


Below are three things to watch closely in the wake of Trump's historic 2025 tour of the Middle East.

Iran: deal or no deal? 

The greatest strategic challenge for regional security remains Iran and its network of proxies that have undercut the stability of the state system for decades. Trump's early months in office this second time around have witnessed a prioritisation of resolving the Iran nuclear issue, with four rounds of talks producing some hopeful signs for a positive outcome, and increased talk about how Iran's weakened position across the region could lead to wider discussions about its regional approach. 

As has been the case for the past decade, negotiations with the leaders of the Islamic Republic of Iran can take longer than expected and produce all sorts of uncertainties along the way, but a deal with Iran even just on the nuclear issue that avoids a wider war could change the whole rationale and context for this US-Saudi defence package.

 BASHAR TALEB / AFP
A Palestinian child looks on as bodies of victims of Israeli overnight airstrikes in the northern Gaza Strip lie on the ground in front of the Indonesian Hospital in Beit Lahia on March 20, 2025.

Palestine: when will the carnage stop? 

The second-biggest sticking point in the Middle East is the absence of a clear pathway to resolving the Israeli-Palestinian conflict, and the deteriorating humanitarian and security conditions for millions of Palestinians living in Gaza cast a pall over the dreams of shared prosperity and security that Trump envisions in an expanded Abraham Accords. By all accounts, Saudi Arabia and other key countries in the region that currently do not have open relations with Israel aren't likely to budge without an end to the war in Gaza and a clear pathway to a two-state solution. 

Syria: will it come together or fall apart? 

Another big headline from Trump's trip was his surprise announcement that he was lifting sanctions on Syria, a country that has been isolated for decades due to its support for terrorism, repression, and cooperation with Iran. 

The collapse of the Assad regime last December remains the biggest strategic event of the past year for the region, and Trump's move to lift the fetters that were holding back full-fledged economic support to Syria from regional actors could be a game changer.  Like Palestine and Iran, Syria is another lynchpin that will shape the strategic context for this bilateral defence deal presented during Trump's trip to the Middle East.

President Trump has taken an important step to prioritise the bilateral relationship with Saudi Arabia in his broader approach to the Middle East, and time will tell if his move to double down on this investment will pay dividends for both countries.  

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