What is the inscription on the granite block referring to referring to World War One

[Verse 1: Mario]

It's-a-me, the Mario, the one that's gonna beat 'cha

It's gonna be, a party, yo, cause I brought my red suit, uh

You got speed, but you're really slow, cause it is not gonna save you, 'ya

You wanna be another Mario but you are gonna lose, uh

Look at you with your, ugly red shoes, eh uh

You look like you lost all your clothes, ooohh

It's -a me, a-Mario, the one that's gonna beat you

So you better back up now before you get bruised, (bruised, bruised)

[Verse 2: Sonic]

You can’t mess with me, cause I’m pure speed

I’m gonna leave you in the dust, you see

I can beatbox so much better

But you’re just only getting fatter

We know you like to live in the sewers

That’s why you smell like Kooper’s poopers

The castle is easy to break in

That’s why your girl is always taken

He only cares about the trophy

That's why he's always killin Yoshi

(Super, super, super, super!)

Supersonic, baym

Sonic, you can't mess with supersonic

You can't mess with supersonic

You can't mess with supersonic (So-nic-speeed)

You can't mess with supersonic

Explanation: