The Istari

[Boromir88]

The other two were the Blue Wizards, named Alatar and Pallando (Morinehtar and Romestamo in later writings) travelled into the East. At first Tolkien wrote that they had simply travelled into the East and what happened to them was uknown:

"And the other Istari who went East of Middle Earth and don't appear on these stories..."~Unfinished Tales, The Istari

"I really do not know anything clearly about the other two- since they do not concern the history of the N.W. I think they went as emissaries to distant regions., East and South, far out of Numenorean range: missionaries to ’enemy- occcupied lands, as it were. What success they had I do not know; but I fear that they failed , as Saruman did, though doubtless in different ways; and I suspect they were founders or beginners of secret cults and ’magic ’ tradiitons that outlasted the fall of Sauron"~Letter 211

At first we really don't know what was the fate. They did travel out into the East, 'into Enemy lands' but Tolkien suspects they failed in their mission. However, in his last writings, he tells us that they mus thave been of a big importance in reducing the number of men in Sauron's armies:

"But the other two Istari were sent for a different purpose. Morinehtar and Romestamo. Darkness-slayer and East-helper. Their task was to circumvent Sauron: to bring help to the few tribes of Men that had rebelled from Melkor-worship, to stir -up rebellion...and after his first fall to search out his hiding (in which they failed) and to cause dissension and disarray among the dark East...They must have had very great influence on the history of the Second Age and Third Age in weakening and disarrayinbg the forces of the East...who would both in the Second and Third Age otherwise have outnumbered the West."~Home XII Last Writings