Israel’s military said its mission to destroy an estimated 500 kilometers of Hamas tunnels across the Gaza Strip will take months, causing a scale of urban destruction that may prove impossible to reverse.

The devastating outcome of a drawn-out campaign against the militant group — with airstrikes and ground battles continuing alongside the tunnel attacks — is likely to leave many of about 2.2 million Palestinians homeless and a question mark over where they can be rehoused.

In Beit Hanoun, a town of more than 50,000 people in the northern Gaza Strip, a 41 kilometer-long Mediterranean enclave run by Hamas, the Israeli military has set about blowing up almost 100 shafts and several dozen tunnels, said Lt. Col. Amit, who is overseeing their destruction and withheld his surname in line with army rules.

Beit Hanoun was among the places from which Hamas launched its surprise attack on Israel that killed about 1,200 people on Oct. 7, triggering the ongoing counter-invasion. Hamas is designated a terrorist organization by the U.S. and European Union.

"The way it is now it’s not livable,” Amit said of the town in a briefing near Gaza at the Tze’elim military base, where his 252nd Reserve Division is based. "This is not beautiful what we’re doing. There is nothing nice about wars but this is necessary.”

Israeli troops on the ground in the Gaza Strip on Thursday. Israel has yet to show it has a plan for Gaza after the war.
Israeli troops on the ground in the Gaza Strip on Thursday. Israel has yet to show it has a plan for Gaza after the war. | Israeli Army / via AFP-Jiji

The destruction of tunnels is advancing Israel’s stated aim of dismantling Hamas infrastructure so the group can’t repeat its deadly Oct. 7 assault. At the same time, reducing much of Gaza to rubble — which Hamas-run authorities say has killed at least 16,000 people to date, mostly civilians — is raising international concerns, including in the U.S.

The inhabitants of Gaza have been driven south by the fighting, but Israel’s campaign has started to move in the same direction. The United Nations has warned that civilians have run out of safe harbors and may need to be displaced into neighboring countries.

The situation is "fast deteriorating into a catastrophe,” U.N. chief Antonio Guterres said Wednesday, dramatically escalating his call for a cease-fire.

The tunnels, which are used by Hamas to move its militants from one place to another and to store weapons, are mostly located in densely populated areas, Amit said, using a map to illustrate.

Many are booby trapped, as are houses and roads, meaning that heavy demining equipment such as bulldozers are needed, increasing the extent of the damage. In a presentation, the military showed photographs and videos of rockets, grenades and Kalashnikov automatic rifles it said were found stashed in homes, schools and hospitals.

"Our goal is to hurt Hamas and destroy Hamas as a political and military organization but you can see that these shafts are under normal people’s homes,” Amit said, with his talk occasionally punctuated by the roar of fighter jets heading toward Gaza.

Displaced Palestinians who fled Khan Yunis setting up camp in Rafah further south near the Gaza Strip's border with Egypt, on Thursday.
Displaced Palestinians who fled Khan Yunis setting up camp in Rafah further south near the Gaza Strip's border with Egypt, on Thursday. | AFP-Jiji

The military has so far discovered 800 tunnels across Gaza and destroyed 500 of them, with Beit Hanoun an area of particular focus. Now virtually all the inhabitants have fled the town, of which little is left. Amit is a reservist whose civilian work is in urban renewal, though he says he’s now doing the opposite.

Some of the shafts are 30 meters deep, equivalent to the height of a 10-story building. Destroying them is a painstaking process with a considerable amount of explosives required to break down the concrete walls and blast-resistant doors.

Hamas has been building the tunnels since 2008 and "it will take months,” he said. "We will be able to destroy Hamas as a functioning organization and then the infrastructure will take time.”

Israel has yet to show it has a plan for Gaza after the war. Key allies such as the U.S. have expressed concern about the absence of a long-term strategy, as have key Arab nations.

Yet for now, the military isn’t letting up on pursuing its goals for the territory — regardless of the damage caused.

"For Gaza to be demilitarized, there is only one force that can see to this demilitarization — and that force is the Israel Defense Forces,” Benjamin Netanyahu, the country’s prime minister, said on Dec. 5. "I am not prepared to close my eyes and accept any other arrangement.”