Yep they did, more info here:
http://www.axishistory.com/index.php?id=5803
http://www.axishistory.com/index.php?id=5804
And, non Arab Muslims did their “part” as well:
http://www.axishistory.com/index.php?id=1927
http://www.axishistory.com/index.php?id=1927
http://www.axishistory.com/index.php?id=1925