There are two Orc-fortifications along the Anduin which are a cause of concern for Fuirgam.
'${PLAYER}, there are a pair of Orc-fortifications defending the banks of the Anduin: one which they call Durbúrz-stazg lies immediately to our north; the other -- Fállug -- a bit further to the south. One of our first objectives here is to eliminate these two fortifications so that our landing can continue unimpeded.
'We need you to bolster our forces attacking the encampments, particularly the assaults upon their gates. You must choose one of them to assault -- you cannot be in two places at once -- take its gate, and hold it for as long as you can. We will send reinforcements there as soon as possible.'
Durbúrz-stazg lies to the north of Echad Sirion. Fállug lies to the south of Echad Sirion.
Fuirgam has ordered you to take the gate of one of the Orc-fortifications along the banks of the Anduin river.
Durbúrz-stazg lies to the north of Echad Sirion. Fállug lies to the south of Echad Sirion.
Now that you have taken the gate of one of the Orc-fortifications, you must hold it against the Enemy.
Fuirgam's Aide is at Echad Sirion, on the eastern bank of the Anduin.
You should return to him with tidings of your victory.