A place defended by a wall is called a building. If it's a really strong wall, it might be called a fortification (or a fort, for short).
people
guards soilders
there wasn't anything to defend it from.
Soldiers defended the Great Wall of China by standing guard over the wall from the watch towers
At a place called Golgotha (which means 'the place of a skull) outside of the then city wall of Jerusalem.
Castles usually defended themselves by having a wall with a moat or ontop of a hill
because the wall that the Saxons had made had defended them from the arrows
Constitutionalists
wagon fort
Some of the best soldiers had to guard it and fight against the people coming to invade China
people flung slushies from the top and brain-freezed their enemies to death
The wall is typically defended through a combination of physical barriers, surveillance systems, and personnel. These may include guard towers, patrols, and security checkpoints to monitor and control access. Additionally, technological measures such as cameras, alarms, and motion sensors enhance security. In some cases, natural obstacles and strategic fortifications bolster the wall's defenses against potential breaches.