When on parity technologically, they not only repelled but claimed the holy land the crusaders fought for, then centuries later managed to claim the last remnant of the Roman empire.

Fortunately for us, they couldn't progress technologically as fast compared to Europe, Asia and America and while they were a thorn in European shipping for a while, after solidifying America's policy of 'Do not fuck with our boats!' they no longer became an issue.

Compare that with Africa and, well..it's not as big a list in achievements..