I think this should go without saying, but, here's your obligatory Spoiler Warning.

If you saw Game of Thrones Season 7 Episode 6 (or you don't really care about spoilers) then read on. If you haven't watched the episode but you're reading articles about the show...here's an article we did about cats.

Still around? Cool. Let's get into it.

For last week's episode, check out - This is what Game of Thrones can teach you about squad composition

Situational awareness isn't a skill a warfighter picks up overnight. It's the concept of living your life with your head on a swivel. It's why so many veterans and active duty troops keep their back to a wall and an eye on the door like they're Jason Bourne.

This is what Jeff Cooper described in his book "Principles of Personal Defense" as "living in Condition: Yellow."

(Scale by Jeff Cooper via Principles of Personal Defense)

White is being blissfully ignorant and Orange being hyper-vigilant to the point of paranoia. Yellow is the perfect middle ground of quietly observing. It's also referred to as "relaxed alert."

Red, Gray, and Black are the states of action with varying degrees of how one reacts in confrontation to a threat. Red or "primed for action" is the desired state when sh*t hits the fan. Grey is a state of chaos and Black is total panic, both causing the war fighter to ignore or forget their surroundings.

We can break down the reactions of how the team of Westeros' greatest fighters devised a strategy to capture and extract a wight (the reanimated skeletons that fight for the Night King.)

Deep in conversation, they're still watch their surroundings (Photo via Army.mil & Screen grab via HBO Go)

As the team of badasses move through the frozen north, they generally maintain Condition: Yellow. Tormund may be joking about his three best ways to keep warm, but he's still eyeing his surroundings.

It's only Gendry, the fighter with the least experience, who is in Orange. He's uneasy about his "squad mates." He's never been beyond the wall, or even acclimated to the snow. He's nervous and it shows.

When the group comes to the open field shrouded in snowfall, the group loses their control of situational awareness. And this is common in every battle.

The Prussian military analyst Carl von Clausewitz said of this: "War is the realm of uncertainty; three quarters of the factors on which action in war is based are wrapped in a fog of greater or lesser uncertainty. A sensitive and discriminating judgment is called for; a skilled intelligence to scent out the truth."

This has since been called the "fog of war." Same concept as in video games, but our heroes also have to contend with a literal fog that hide their enemies as well as allies. With the probable threat nearby, they form up and prepare to engage.

Note the 360° Perimeter (Photo via Wikimedia & Screen grab via HBO Go)

The squad isn't able to spot the zombie bear in time and after it caught on fire, Sandor Clegane is terrified. He is a prime example of how even the greatest of war fighters can still lose their composure. He's in Condition: Gray.

They find their stray wight with a white walker and his soldiers. The rest of the steps in maintaining situational awareness are further explained in fighter pilot and military strategist John Boyd's OODA Loop, which is the constant cycle of Observing, Orienting, Deciding, and Acting.

(Chart via Wikicommons)

Through the OODA Loop, they observe the valley and have a count how many enemies there are. They orient themselves to position themselves to push through with the exit to their front. They decide who is attacking whom, with John (the only one with a Valerian Steel sword) attacking the leader.

And in action, it works flawlessly. They capture and bind the enemy. But not before it calls for reinforcements.

They send Gendry as a runner to get the message back to Daenerys. Keeping higher command aware of what's going on in the field is paramount for operation success. But Gendry has another critical mission: to call in air support.

As the undead horde swarms the squad, they come across a lake with thin ice and an island with a high observation point. They use this perfectly to their advantage. The ice shatters, creating a moat-like barrier around their island. They can hold the island long enough for extraction.

If it looks stupid but works — it ain't stupid.

A good fighting position makes all the world. (Photo via Army.mil & Screen grab via HBO Go)

Operationally, everything has been relatively smooth. Only one character with a name has died so far. It's cold, but they have eyes on every target, including the enemy leaders — who's elimination would end their magically undead army. You can point out everything thus far as prime examples of things you should do before and after first contact.

Now comes the example of what happens when you march into battle with no situational awareness, no understanding of your enemy, very little experience, and way too much confidence.

If everyone is waiting on you...move. (Photo via Defense.mil & Screen grab via HBO Go)

Air Extraction has touched down on the landing zone and air support is (literally) lighting up the enemy. Daenerys and her dragons have arrived. Minutes before, she didn't believe the enemy existed and now she's fighting the massive army of the dead.

Her dragons have been injured before; Drogon has taken spears from Sons of the Harpy and the Lannister's Scorpion and he survived. And in battle, we all think we are invincible...until we're not.

Viserion, the golden dragon of Daenerys, is slain after the Night King impales him with an ice spear.

It was the lack of situational awareness that kept the group from identifying not one but two ice spears. Jon Snow, with all of his experience in combat, really is a slow-learner as far as battle tactics go. He spots the second spear in time to send off a warning, but is left stranded on the battlefield with plan.

Sure, he's alright and thanks to plot armor he makes it out of there alive, but really Jon, it's time to start studying combat strategy. It's almost as if he forgot everything he had learned about situational awareness up until this point...