What is the Bab el-Mandeb Strait, and why does the Houthi ‘blockade’ threat against Saudi Arabia matter?
Yemen's Houthi movement declared a naval blockade against Saudi Arabia on July 20, 2026, threatening shipping through the Bab el-Mandeb Strait
The declared blockade was announced as retaliation for a strike on an airport in Yemen's capital, Sanaa
The threat comes against the backdrop of the Strait of Hormuz being effectively closed since the outbreak of the US-Iran conflict in late February 2026, raising the strategic weight of the Bab el-Mandeb route for Gulf oil exporters
Analysts have flagged that a full closure of the strait could remove a significant share of global oil supply from the market, given Saudi Arabia's reliance on the route to move crude exports
Bab el-Mandeb Strait — Geography and Strategic Chokepoint
Bab el-Mandeb (Arabic for "Gate of Tears") is the strait linking the Red Sea to the Gulf of Aden and, by extension, the Indian Ocean. It lies between Yemen on the Arabian Peninsula and Djibouti and Eritrea in the Horn of Africa.
Key Details
- Narrowest point is approximately 16.5 km wide, between Yemen's Perim Island and Djibouti; a second narrow section lies near Eritrea's Hanish Islands
- Roughly 12% of global trade transits the Red Sea corridor via Bab el-Mandeb en route to and from the Suez Canal
- Falls under the UNCLOS transit passage regime (Article 37), since its narrowest sections are under 24 nautical miles wide — a more permissive regime than "innocent passage," under which coastal states cannot suspend passage
- Comparable chokepoints: Strait of Hormuz (Persian Gulf–Gulf of Oman link, carries roughly a fifth of global seaborne oil trade) and Strait of Malacca (Indian Ocean–South China Sea link, a key India–ASEAN–East Asia trade artery)
The Houthi blockade threat targets this exact chokepoint; its closure would compound the existing disruption at the Strait of Hormuz, potentially constraining Gulf oil exports on both of their principal maritime routes simultaneously.
Global Maritime Chokepoints and India's Energy Security
Chokepoints such as Bab el-Mandeb, Hormuz, and Malacca concentrate a disproportionate share of global energy and merchandise trade through narrow, geopolitically contested waters, making their security a recurring concern for import-dependent economies such as India.
Key Details
- India imports over 80% of its crude oil requirement, with a substantial share transiting the Persian Gulf via the Strait of Hormuz and the Red Sea–Suez–Bab el-Mandeb corridor toward Europe and the Mediterranean
- Houthi attacks on commercial shipping in the Red Sea since late 2023 have already prompted many global carriers to reroute via the Cape of Good Hope, lengthening transit times and raising freight and insurance costs on India–Europe trade lanes
- The Indian Navy maintains an anti-piracy and merchant-shipping-protection presence in the western Indian Ocean and Gulf of Aden, consistent with India's stated role as a "net security provider" in the Indian Ocean Region
A blockade at Bab el-Mandeb directly threatens the Red Sea corridor that Indian trade with Europe relies on, and combined with the ongoing Strait of Hormuz disruption, it raises India's crude oil import costs and shipping insurance premiums.
UNCLOS — Straits Used for International Navigation
Part III of UNCLOS (Articles 34–45) governs straits used for international navigation, distinguishing the transit passage regime (applicable where a strait connects two parts of the high seas or an exclusive economic zone) from the more restrictive innocent passage regime that applies within a state's territorial sea.
Key Details
- UNCLOS was adopted in 1982 and entered into force in 1994; India ratified it in 1995
- Under transit passage, all ships and aircraft — including warships and military aircraft — have a right of continuous and expeditious passage that littoral states cannot suspend, unlike innocent passage, which can be suspended temporarily for security reasons
- Other geopolitically sensitive straits governed by this same regime include the Strait of Hormuz, the Strait of Malacca, and the Danish Straits
A declared "blockade" targeting shipping linked to a specific state raises questions under international law, since transit passage rights through international straits are, in principle, protected for all shipping regardless of a regional conflict between littoral or nearby states.
- Blockade declared: July 20, 2026, by Houthi forces against Saudi Arabia
- Strait width: approximately 16.5 km at the narrowest point (Perim Island–Djibouti) to about 32 km at its widest
- Bordering states: Yemen, Djibouti, Eritrea
- Share of global trade transiting Bab el-Mandeb/Red Sea corridor: approximately 12%
- Potential global supply impact if fully closed: cited estimates of up to a 7% cut to global oil supply from this strait alone, and up to roughly 25% of global oil and gas supply at risk in combination with the Strait of Hormuz disruption [figures as reported; treat as estimates]
- Strait of Hormuz reported effectively closed since: late February 2026, coinciding with the outbreak of the US-Iran conflict