What would an Israeli ground assault in Gaza look like? Here's what I know from the one I saw

"Get down!" the medic in the front seat hissed as our ambulance approached the Israeli checkpoint.

I could see through the front window tanks by the side of the road, nervous Israeli soldiers raising their guns as we approached.

This was January 2009 and the CNN crew had caught a ride with a convoy of ambulances going from Rafah in the southern Gaza Strip toward Gaza City along the coastal road. The medics allowed us to come along on the condition we hid on their stretchers.

This was what Israel had dubbed "Operation Cast Lead," the first in a series of flare-ups of various durations between Israel and Gaza in 2012, 2014, 2021 and 2022. The ongoing operation in Gaza was preceded by another one this May.

After a brief exchange with the medics in the lead ambulance, the soldiers waved us through without inspecting the ambulances.

It was the deepest Israeli ground operation into Gaza since the withdrawal from the Strip in 2005. Then, Israeli troops largely avoided the most built up and crowded areas, particularly Gaza's eight crammed refugee camps. They were well aware that entering into the narrow alleys of camps like al-Shati, one of the most crowded, would be risky. Their focus was on controlling the periphery of urban areas.

Israel's tactics have always been to move fast, control as much territory as possible, but avoid street-to-street, house-to-house fighting where a weaker opponent can take full advantage of the terrain. Entering urban areas in Gaza, however, would bring in an entire new element to the fight.