Yemen's Houthis dig 20km tunnel network near strategic waterway

The Iranian-aligned Houthi movement has undertaken significant military engineering works in strategically important locations along Yemen's coast, according to reports of rebel activities in the region. The fortifications span high ground on the Dubaab area and Perim Island overlooking the Bab al-Mandab Strait, one of the world's most critical maritime chokepoints connecting the Red Sea to the Gulf of Aden.

The extensive trench network, stretching approximately 20 kilometres, represents an enhanced defensive posture by the rebels in territory they control. Military analysts suggest the fortifications serve a dual purpose: strengthening ground defences against Saudi-led coalition forces that have conducted operations in Yemen since 2015, and enabling the Houthis to monitor and potentially interdict commercial shipping passing through the narrow waterway.

The Bab al-Mandab Strait is a vital conduit for international maritime commerce, with millions of barrels of oil and significant container traffic transiting the passage daily. Control of positions overlooking the strait provides strategic leverage and has been central to Houthi military strategy throughout the Yemen conflict.

The construction of the tunnel network reflects the Houthis' continued military entrenchment in Yemen despite years of coalition airstrikes and ground operations. Such defensive infrastructure typically indicates preparations for sustained conflict rather than negotiated settlement, complicating ongoing diplomatic efforts to resolve Yemen's devastating civil war.