Attacking Hamas tunnel rats

 USA Today:

As Israeli troops push deeper into Gaza in retaliation for the Oct. 7 Hamas attacks, the ground attack won’t look quite like the door-to-door skirmishes seen in Fallujah, Mosul and other past urban clashes.

Instead, it will happen largely out of sight and underground, deep in a warren of connecting tunnels that Hamas has been digging and lining with concrete for more than a decade. The battle to control and destroy this subterranean labyrinth, estimated at more than 300 miles, will be a key strategy for the Israeli military, according to military analysts and experts – and will make the incursion into Gaza unlike any past urban conflict.

For these “de-tunneling” operations, specialized units code-named Samur – Hebrew for “weasel” – expect to squeeze through the narrow passages and find rocket assembly lines, stores of small arms and mortars and, deeper still, Hamas’ leaders’ lodging and headquarters – much of it probably booby-trapped with homemade bombs. They may also be searching for some of the more than 200 hostages taken from Israel who may be hidden in those same tunnels.

“It’s going to be an undertaking like nothing the (Israeli military) has ever done,” said retired U.S. Army Lt. Gen. Mark Schwartz, who ran U.S. security coordination with both Israel and the Palestinian Authority from 2019 to 2021. “And frankly unlike anything we’ve ever done.”

The Biden administration has sent some of its most seasoned insurgency experts from the war in Iraq and against the Islamic state to advise the Israelis, including three-star Marine Corps Gen. James Glynn, who commanded troops in Fallujah during the Iraq War. In the second battle for Fallujah in November 2004, more than 10,000 U.S. troops went house-to-house clearing the city of 3,000 insurgents in what became the bloodiest battle of the war. Nearly 100 U.S. troops and 2,000 insurgents were killed.

The fight in Gaza may bear some similarities to operations in Fallujah, or in Mosul, where U.S.-backed Iraqi forces flushed Islamic state fighters out of a tunnel network in 2014.

But in Gaza, Israeli forces face more formidable infrastructure and more challenging geography.

Hamas’ tunnel system is more advanced, and its fighters are better trained, more disciplined and better equipped than the Islamic state fighters, said Eitan Shamir, director of the Begin-Sadat Center for Strategic Studies at Bar-Ilan University in Tel Aviv, Israel.

“It’s a major challenge,” Shamir said. “This is a very messy affair.”

And in Gaza – hemmed in by Israel, Egypt and the Mediterranean Sea, which gives civilians nowhere to flee – a ground war is uniquely challenging, said Seth Jones, a military analyst at the Washington-based Center for Strategic and International Studies.

"The intricate nature of the tunnel complex in a densely packed urban environment that is entirely fenced in makes this a fundamentally different – and in many ways more difficult – environment than what U.S. forces had to face in cities like Fallujah or Mosul," he said. “The possibility of civilian casualties is much greater in Gaza.”
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The tunnels have become so elaborate and extensive – Hamas leaders claimed in 2021 they stretched for 311 miles, or nearly half the length of the New York City subway system – that the Israeli military dubbed it the “Gaza Metro,” according to a report this month by the Congressional Research Service. Experts believe some tunnels drop as far as 200 feet – roughly the equivalent of a 20-story building, or a typical airport control tower, underground.

Since at least 2014, the Israeli military has accused Hamas of diverting construction supplies meant for civilian aid into tunnel-building instead.

Over the years, the U.S. has lent its expertise – and money – to help Israel locate and destroy the tunnels and develop technologies to combat them. Since 2016, Congress has appropriated $320 million in Defense Department funding for U.S.-Israel collaboration on “detecting, mapping and neutralizing underground tunnels” in response to the cross-border tunnels built by Hamas, according to the CRS report. In 2021, crews completed an underground concrete barrier with anti-tunnel sensors along the entire 40-mile Israel-Gaza border.
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Remote-controlled robots have been developed to enter and search the tunnels. Israeli engineers also have developed technology that uses acoustic or seismic sensors and software to detect digging, similar to the science used by oil and gas companies to detect oil reserves, according to the Congressional Research Service.

Because some tunnels are so deep and are concrete-lined, they can survive heavy bombing, Shamir said. Hamas fighters are thought to have enough provisions to live several months in the subterranean labyrinth, he said.
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The tunnels are not an area that can be cleared quickly and easily.   I suspect the troops doing the clearing will use grenades to push the Hamas terrorists deeper into the tunnels.