Follow us on social

Block to block in Gaza: What will an Israeli invasion look like?

Block to block in Gaza: What will an Israeli invasion look like?

Hamas has the advantages of an insurgency in a fortified urban environment. Israel has the artillery, bombs, and time.

Analysis | Middle East


The Israeli incursion into Gaza has begun though we do not know yet how full or advanced it will become. But it is reminding us already that war, especially urban combat, is indeed hell.

So what will this ground invasion actually look like on a tactical level?

Gaza proper is roughly 25 miles long and on average 5.5 miles wide. This is a tiny amount of space in which to conduct a large-scale military operation. Most modern artillery can almost shoot the length of Gaza. Most modern anti-tank missiles can shoot half its width. Israeli F-16s can fly the length of the strip in under three minutes and will find it necessary to be in a constant turn to maintain position over Gaza City.

To make the range issue worse is the urban nature of the battlefield. While it might only be around five miles wide, it's highly unlikely that you have line of sight that far due to man-made obstacles — better known as buildings. What this means is no one has superior range. If you can see it, it’s in range. If it’s in range, so are you.

The majority of this space in fact is covered in buildings — shops, offices, schools, hospitals, and residences. Each one provides cover and concealment for fighters. The structures also create natural channels funneling attacking forces into pre-designated fire zones for ambushes or over top of improvised explosive devices.

Israeli armor can’t conduct maneuver warfare on this battlefield. Armor will be sitting ducks without infantry support. Infantry are vulnerable to everything. The Israelis will take losses, and already have, according to the New York Times on Wednesday.

Urban areas pose difficult tactical problems. Fortified urban areas are worse. Over the past decade Hamas has developed a labyrinth of tunnels that are fortified and connected literally across the entirety of the strip, and especially heavy in Gaza City. They use these underground structures for command and control, movement, logistics, shelter, and as a way to “out flank” and ambush an enemy.

Fortified urban areas with significant population density pose the biggest challenges. The majority of combat will take place in Gaza city proper which has a greater population density than New York, Chicago, Boston, Philadelphia or San Francisco. There are over two million people living in an area roughly twice the size of Washington D.C. This means civilians, or non-combatants, are everywhere. Even if half the population has moved south it will still cause the Israelis immense targeting problems.

In addition, the densely populated area compounds the Israeli problem of target identification. Hamas intentionally blends in with the civilian population.

The bottom line for the battlefield is that it helps Hamas and hinders the Israelis. In urban warfare, the defender, in this case Hamas, has the advantage. An advantage that can be mitigated if the attacker has overwhelming firepower, and the will to use it.

How Hamas will fight

Hamas will use the urban terrain to cause excessive Israeli casualties while forcing them to injure civilians to limit those casualties. They will make every block a fortress and every street corner an ambush site. By using the “subterranean flank” they will pop out of tunnels and hiding places in buildings to shoot at Israeli vehicles with missiles, launch grenades, or even throw Molotov cocktails.

While they may not be using Javelin anti-tank weapons (although the threat of Hamas having those weapons shouldn't be dismissed, given what may have been captured or “lost” in Ukraine), their weapons will be more than sufficient to at least disable a tank and cause casualties. The short ranges decrease Israeli reaction time and increase lethality.

Hamas fighters are commingled with the civilian population most likely both intentionally and unintentionally, and will take full advantage of that. They know the world watches what the Israelis do and are counting on pressure to make them stop. Again, they see this war as existential, so they will use any and all means to win.

How the Israelis will fight

First, Israelis must find the Hamas fighters, then engage them in their fortified positions.They must do this without taking unreasonable casualties, all the while trying not to kill civilians.

To find Hamas fighters the Israelis will use a variety of sources. They will have already scanned the electromagnetic spectrum for everything from cell phones, computers, to radios looking for an electronic signature to identify a potential target. They will pour over social media for anything identifiable.They will use drones, manned aircraft, and human reconnaissance teams to confirm and verify what they think they know.

They will do all this and more to listen, collect, and build a targeting picture of command centers, logistics sites, artillery positions, and order of battle — who is who, who has what, and where it is.

This process is called intelligence preparation of the battlefield. This is what the Israelis have been doing — in truth some of their targets were most likely derived long before Hamas attacked just as most certainly Hamas had/has a robust target list of Israeli targets — since the start of hostilities.

The ground incursion of course changes this process. With Israeli tanks and infantry “closing” with the enemy, finding and subsequently engaging Hamas fighters will most likely devolve into merely returning fire — often with zero time to figure out how to limit civilian casualties.

It’s one thing to take a breath and disengage in sparse open terrain, it’s another thing to figure out who is shooting at you.

Once located, the Israelis have a host of options to engage the Hamas fighters. But it’s not a simple task of deciding what weapon is best to use. They have to measure what they do by three metrics: 1) does it achieve the desired effect on the enemy? 2) Can they accomplish the task without losing too many Israeli soldiers? 3) Can they limit civilian casualties, which in excess can be a war loser for Israel?

If civilian casualties weren’t a concern, the Israelis would use their massive firepower to destroy any and all Hamas targets or potential targets. They have the potential to literally level Gaza City using 2,000-pound satellite guided bombs with delayed fuses to smash the known tunnel complexes or at least seal them for eternity. This would meet the goal of destroying Hamas and limiting Israeli losses.

But in reality this approach would cause unacceptable civilian casualties. The inverse would be to advance for a close quarter battle that seeks a more “surgical” path. In a close quarter battle, you do nothing to mitigate the defender’s advantage in urban warfare and you take losses — lots and lots of losses.

Storming a building can be like storming a trench. We have seen what that is like in Ukraine.

So how will the Israelis fight? Their best option for destroying Hamas (which is the first priority), managing their own losses (second priority), and limiting civilian casualties (last priority), will be to strike hard when they have known, verified targets, advance to make contact with the enemy, then choose the weapon to engage. Moving slowly, deliberately, a block at a time.

This is why the prime minister said it would be a long war. This grinds Hamas down through attrition and loss of supply. The longer it takes, the more food, water, and fuel Hamas uses with no hope of real re-supply. The Israelis proclaim this war is existential. They will keep that consideration as they manage the tension of their losses and civilian casualties.

Some suggest this will look like the battle for Fallujah between U.S. forces and Iraqi insurgents. Perhaps. But I suggest it will be more like Stalingrad or Berlin. Like in those battles, both sides see the war as existential and will conduct themselves accordingly.

One thing is for certain, for the populations on both sides, this war is truly hell.


Image released by the Israel Defense Forces (IDF) on Monday Oct 30, 2023 shows its forces continue to expand ground operations in the Gaza Strip. (Reuters)

Analysis | Middle East
Kim Jong Un
Top photo credit: North Korean leader Kim Jong Un visits the construction site of the Ragwon County Offshore Farm, North Korea July 13, 2025. KCNA via REUTERS

Kim Jong Un is nuking up and playing hard to get

Asia-Pacific

President Donald Trump’s second term has so far been a series of “shock and awe” campaigns both at home and abroad. But so far has left North Korea untouched even as it arms for the future.

The president dramatically broke with precedent during his first term, holding two summits as well as a brief meeting at the Demilitarized Zone with the North’s Supreme Leader Kim Jong-un. Unfortunately, engagement crashed and burned in Hanoi. The DPRK then pulled back, essentially severing contact with both the U.S. and South Korea.

keep readingShow less
Why new CENTCOM chief Brad Cooper is as wrong as the old one
Top photo credit: U.S. Navy Vice Admiral Brad Cooper speaks to guests at the IISS Manama Dialogue in Manama, Bahrain, November 17, 2023. REUTERS/Hamad I Mohammed

Why new CENTCOM chief Brad Cooper is as wrong as the old one

Middle East

If accounts of President Donald Trump’s decision to strike Iranian nuclear facilities this past month are to be believed, the president’s initial impulse to stay out of the Israel-Iran conflict failed to survive the prodding of hawkish advisers, chiefly U.S. Central Command (CENTCOM) chief Michael Kurilla.

With Kurilla, an Iran hawk and staunch ally of both the Israeli government and erstwhile national security adviser Mike Waltz, set to leave office this summer, advocates of a more restrained foreign policy may understandably feel like they are out of the woods.

keep readingShow less
Putin Trump
Top photo credit: Vladimir Putin (Office of the President of the Russian Federation) and Donald Trump (US Southern Command photo)

How Trump's 50-day deadline threat against Putin will backfire

Europe

In the first six months of his second term, President Donald Trump has demonstrated his love for three things: deals, tariffs, and ultimatums.

He got to combine these passions during his Oval Office meeting with NATO Secretary General Mark Rutte on Monday. Only moments after the two leaders announced a new plan to get military aid to Ukraine, Trump issued an ominous 50-day deadline for Russian President Vladimir Putin to agree to a ceasefire. “We're going to be doing secondary tariffs if we don't have a deal within 50 days,” Trump told the assembled reporters.

keep readingShow less

LATEST

QIOSK

Newsletter

Subscribe now to our weekly round-up and don't miss a beat with your favorite RS contributors and reporters, as well as staff analysis, opinion, and news promoting a positive, non-partisan vision of U.S. foreign policy.