had the high ground

[KLPNO]

Hello everyone
I'd like to ask about the meaning of 'have the high ground' in the following passage.

GDI troops are in Australia and they are fighting the enemy. The author writes as follows:

GDI had the high ground in this spot in Y-4, in the midst of the Australian Outback, which was good, since half of them had had to abandon their primary weapon.
The good news was that, when the EW1s worked, they worked beautifully.

EW1s are the weapon mentioned above.
Does 'had the high ground' mean 'had advantage' or is it used in direct sense meaning that the place GDI soldiers were in is higher than their enemy position?

[Anglika]

As you give it, they physically had the higher ground, and therefore a likely advantage.

[KLPNO]

Originally Posted by Anglika

As you give it, they physically had the higher ground, and therefore a likely advantage.

Thank you very much, Anglika.