The Israeli Gaza ground assault has begun. It is not going to be an easy battle, even with Israel’s vastly superior weaponry. The Ukraine War is dragging out into sustained battles, but it is spread over a vastly greater area. Gaza is an urban environment, where behind every building there could be a sniper, and booby trap in front of every step. Hamas has a vast tunnel network, far more extensive that used by the Vietcong in the Vietnam War. While the media had reported on poison gas being used in the tunnels, apart from the rules of war, it is probable that some sort of ventilation systems would be in place to deal with this; Hamas certainly had plenty of time to prepare for scenarios like this.
In any case as detailed below, the long-term for Israel to deal with the Gaza problem are challenging. Military occupation will be hugely expensive. Merely eliminating the present Hamas leaders then leaving will kick the can onto the next generation. A fulltime occupying UN peace keeping force, given the failures of such ventures elsewhere, is unlikely too. Thus, the options are all limited, but must be addressed once the present fighting ends, however long that takes. Probably some temporary sub-optimal “solution” will be adopted.