Is the "A New Order" Campaign Canon in Wesnoth's Lore?

[QHero]

I was trying to map out a timeline from 800 YW to 950 YW so that I could build a campaign which kept in line with the continuity. It was going well until I reached this information on the Garardine Dynasty page of the Wesnoth wiki: "It was a descendant of these rulers that married the Hagarthen king of Vakladia, and whose son in around 900 YW became King Gawen Haldric Hagarthen, the first Garardine to rule all of Wesnoth in more than 250 years."

I did some more research and noticed that it was an add-on, but the fact that it was still on the wiki confused me a bit. Is it canon, or does King Gawen Haldric Hagarthen not really exist?

[sergey]

As I know, add-ons are not "official history". I was surprised to see the quote mentioned by QHero here https://wiki.wesnoth.org/Garardine_Dynasty. And it was already there in the initial version of the page, 11 November 2007‎.

[QHero]

That's very strange. I'll act under the assumption that it isn't canon for the moment in that case. Thank you for the help!