After Israel took sinai in 1967
They made napalm line into the canal to turn it into hell fire in case the Egyptian tried to cross
Then they built a wall of sand that reached 20 meter with a vertical angle to tanks and vehicles can not cross and behind all of this was the bar level fortifications which consisted if 36 stronghold across
the canal and behind them were two more defensive lines
How Egypt crossed this??
Well this operation is being studied till this day in different military academy including the USA academy
U can watch this video for details