Dr Adrian Goldsworthy

He's got, once he's done that, he's got to supply it.

Now, he controls this big empire administration.

It's...

There's a way to do that, but it doesn't mean it's easy.

So you have this big army has started to come towards you, but you don't have detailed intelligence.

There's no satellite images to tell you what somebody's doing, where they are.

There is a sense both armies are blundering around blind, but you know that somewhere out there eventually, you can't just keep marching around the Persian Empire, taking these cities and not expect them to argue.

The great king is going to turn up at some point or his army is going to turn up at some point.

But again, we know this is going on.

Alexander is existing and this could happen at any time.

But I can't stop.

I've got to keep going because I can't sit down.

A, I've got to keep this momentum.

I've got to convince people that wherever I come, I will win.

So you might as well give in to me straight away rather than first rather than last.

Avoid the suffering.

But also at some point, I'm going to meet something bigger than this.

Alexander shows he'll trust him by drinking the draught that he's... Again, it's that mixture of Alexander the savage and Alexander the very kind, the very... I trust you.

They're always both there.

It's a shock to everybody.