[Little Ray]

Gee, I seem to recall the Muslim (OK, Turks) laying siege to Vienna in 1683 and only the intervention of the Poles under King John III Sobieski lifted this siege.

The Crusades were in defense of the Eastern Roman Empire, which was hard pressed. Unfortunately, the Crusaders were as like to loot the Byzantines, as they were the Turks.

I'd say their expansionism was just paused for a wee bit, that's all.

[ZULU]

"Gee, I seem to recall the Muslim (OK, Turks) laying siege to Vienna in 1683.."

Correct, see my post.