Riddle me this… (2/3)

Good Lords, Fair Ladies!

As you may remember, a couple of weeks ago we found a mysterious scroll. That time a lot of you solved the riddle, but now we’ve got a new one. A strange old man visited and told us this prophecy:

Hark, seeker of riddles, a challenge awaits!
A cryptic clue, a puzzle of fate.
With coordinates given, a compass to guide,
To a battle of ages, where heroes did stride.

At 38°47′45″N, 22°32′13″E a place defined,
A field of echoes, where history’s entined.
In this location warriors did boast,
Their courage and might esteemed the most.

The battle fought here inspired a game,
A key mechanic, each player to tame.
Recall the year, a memory bright,
When history’s drama took its flight.

So search through history's dusty tome,
And find the year when swords did roam.
With this password you shall prevail,
And unlock the secrets this riddle entails.

it’s as if someone tries to convey something… What can it possibly mean?

Please, help us decipher this. We, on our part, will also search for more clues and will be back as soon as we find something!

Yours, the Door 407 dev team