Is the Mandalorian War canonical again?

Question

My understanding of the Disney canon is that everything was purged. This would include all the Old Republic games and comics books associated with them that mentioned the Mandalorian War.

In the episode of Star Wars: Rebels "Trials of the Darksaber", however, Kanan gets angry at Sabine for attacking him with Mandalorian tricks and said:

History lesson: the Jedi won the war with Mandalore.

Is Kanan referring to the Mandalorian War here, and are there any other sources more obviously confirming that the Mandalorian War happened in the new canon?

Answer 1

Mandalorian-Jedi conflicts are canon...

This has been true at least since season 2 of The Clone Wars animated show, when Obi-Wan references ancient conflicts:

Obi-Wan: I know these commandos fought in many wars, often against the Jedi.

^{Star Wars: The Clone Wars Season 2 Episode 12: "The Mandalore Plot"}

And later episodes glimpsed Mandalorian art, depicting ancient Mandalorians battling lightsaber-wielding figures:

^{Image from Star Wars: The Clone Wars Season 5 Episode 16: "The Lawless"}

... but the Mandalorian Wars are not

Unless future canon works reference other elements from those series, no other elements of the Old Republic games, novels, or comics are canon. This has been the consistent position of the LucasFilm Story Group ever since the Legends/Canon division was first announced: referencing an element of Legends continuity in a Canon work only canonizes that element, not the entirety of its (expansive) EU history.

So, unless a future Canon work says otherwise, nothing about the Mandalorian Wars as seen in past works is canon.