Generally when an MMO hits that point where it has merged down to its last server, you can bet that the game is either one step away from the chopping block at worst, or will remain in maintenance mode for the rest of its life at best. Sadly this is exactly what Vanguard players are experiencing as Sony has announced that the Halgar and Telon servers will be merging as of April 4th. The servers will be down for twenty four hours, after which the Halgar server will remain online until the end of business on April 9th. All characters above level 10, plus those below level 10 which have logged in since October 3rd, 2012, and before the April 3rd transfer, will be moved over to Telon.
Halgar characters will also be reimbursed for the cost of their houses, however they will have to find new housing when their characters transfer over. For more details, click the link below to see the transfer FAQ.
(Source: Vanguard)
MMO Fallout 
Halgar had been all but abandoned for years. All the people that Vanguard picked up during the free to play change (which admittedly was not a vast number of people, but the impact in the game was huge) joined on Telon for this reason.