Expert: Hezbollah has built a vast tunnel network far more sophisticated than Hamas's

Hamas isn't the First Military Group to Hide Behind Civilians as a Way to Wage War

As Israeli forces prepare to enter Gaza, a major part of the battle will be underground

Opinion: 'Dark, terrifying, claustrophobic.' What it's like inside Hamas' tunnels

It's like being underwater': What Israeli soldiers will face inside the labyrinth of Hamas tunnels

A Gaza Conundrum: The Story Behind the Rise of Hamas - DER SPIEGEL

The Path to October 7: How Iran Built Up and Managed a Palestinian 'Axis of Resistance' – Combating Terrorism Center at West Point

500 kilometers of tunnels: How Hamas built an underground city

Hamas' Secret Tunnel Network Complicates Israel's Gaza Ground Invasion Plans - Bloomberg

Hamas Turns Gaza Streets Into Deadly Maze For Israeli Troops

Hezbollah's Tunnel Network 'Spooks' Israel; 'System Far More Sophisticated Than Hamas'

Can Israel conquer Gaza's terror tunnel network? - Globes