So, after figuring out how to manage my economy, I was rich enough to send an expeditionary force by sea to help Gondor against Mordor after landing near E. Osgiliath I headed to Cair Andros as it was under control by Mordor so I thought we could establish a forward outpost in there for all future operations, how wrong I was...
At first we took it easily with some help from Gondor;
Victory celebration with our Gondorian brothers;
But then about 3000 elite troops of Mordor invaded the island and surrounded the fortress...
A fierce battle ensued but there was no sign of Gondor...
Finally, we couldn't hold the endless hordes and Mordor reconquered it;
Oh god, if only they knew what's coming at them now... They killed our King, they shall pay for it!