Hello and welcome back to cyber is physical security for end users. Course. This is Lesson one doc to ancient physical security.
I have three objectives for this lesson, and they are as follows. We're going to discuss the concept of defense in depth,
also known as layered defense. ING
will discuss the purpose of physical security in ancient times,
and we'll look at many of the components that made up ancient layered defenses.
Now, if there's anything I want you to take away from this
lesson, it's this concept right here, defense in depth.
The concept of defense in depth is how we employ multiple security measures in concert with one another to ensure that
the thing we want to protect is truly protected from any kind of threat.
the reality is, is that no single measure of defense can answer every kind of threat.
So a planner will instead use many types of defenses in concert with one another to ensure that the people and the property that they want to protect will be protected
Why did they need the physical defenses in the Middle Ages?
The reality was there were no organized national armies.
There were no police forces that could
patrolling area and protect people from harm.
or nights were given plots of land on which to build
some kind of walled defense
to protect the people
or sieges from the from the armies of other countries.
So when they were building those cities
for those world strongholds,
what consideration went into
where they would actually build it? Well, there are three words
location, location, location.
Now I know that sounds a little corny,
but the reality is, is that natural terrain was the cheapest and simplest first layer of defense
that these people could use when protecting what was important to them.
They could use things like high ground
to improve their ability to be able to see the enemies approach. Long before he got to the walls of the town,
they used open space to create that distance between the attacker without and those they were protecting from with in within.
They used uneven ground to slow the approach and to improve their amount of time or increase the amount of time
that they had to react to the enemy forces.
And they would also use bodies of water to keep that distance. Once
the adversary was at the gates,
let's look more closely
at the defenses and how they could be used.
Well, let's start with the bodies of water. Now, most cases
of natural of bodies of water. First, those that are man made,
as in the picture that we see in the lower right hand corner.
natural rivers and lakes. To be used as
defences against an approaching adversary
like I mentioned earlier, creates space and creates that distance. We're now the
the adversary has difficulty scaling the walls because he asked across a body of water before he can actually even approach the wall.
It also restricts the ways in the avenues of approach that the adversary can use.
He can't massive strength against the wall to knock it down or to scale it
walls and watchtowers.
Now we saw in the last picture and we can see on the last slide, and we can see in the graphic here
that walls and towers provide a great natural defense to shield the people within.
It also protects the buildings within the castle or stronghold
and it gives the defenders instant high ground, even if the the castle does not is not built on a hill
or some kind of high point.
The towers gave them elevation over the land.
It allowed them to see who was coming and going and give them a vantage point from which to watch the enemy.
A war watchtower also gave them hardened position and natural defence against an attack from without
now, as just kind of obvious,
no walled city could survive if there was no way to get in and out
off the town itself. They needed Ingress is, and egress is in the walls of the strong holder city
in order to allow the natural flow of traffic.
But in times of strife, when Raiders would would
tried to pillage the town or in Enemy's forces were there to siege the town,
they needed to harden those effective weak points.
They did this through iron gates,
reinforced our reinforced doors
in order to protect and prevent
the enemy from entering.
You can see in the picture here how they use the med metal, poor collis, or gate to that they could drop down
if enemies were approaching,
and no physical defenses would be complete without having actual people there
attack the return fire on the enemy
Just defend the walls.
Cities needed defenders, and defenders needed training.
They needed equipment. They needed arms to fight off the attacker.
They also needed money,
and they needed tactical leadership in order to be able to perform their intended role to protect the town or stronghold.
In this video, we talked about the concept of defense in depth
or layered defenses.
We looked at the purpose of physical security and the role it played in ancient times,
and we looked at the different components of ancient, layered defenses,
thank you very much and look forward to seeing you in the next lesson.