True as a race the ancients were only half involved in the war with the wraith, being as the ancients never seem to be in agreement especially with half of them always being ascended.
And just for the record I don't think the ancients were ever really defeated, it was more like strategic withdrawal. This added in with the fact that all humans on Earth are there descendants (which technically makes them part of the ancient race) means that they carry on the fight with the wraith, the war continues..
I am your sword, I am your shield,
Surrender is not an option()