They weren't so successful at conquering Europe or China. Of course, one can blame the long supply lines, but in these cases their adversaries were also determined to repulse them.
In contrast, Byzantium and Persia were exhausted from mutual warfare. Tribes related by kinship to Muslim Arabs had served as mercenaries during this period, so there was a lot of tactical knowledge available.
The Byzantines retreated to the highlands of Anatolia upon losing their lower-lying provinces to the Muslims. I am not sure if they launched a determined counter-attack. The Persians did, but they could not fight coherently.
They cannot, eventually the citizens will find out
During the early 2000s, the most popular music file-sharing service in comparison with others is: Napster.
A music file-sharing service refers to an online platform that has a network of computers to allow its end users store and stream digital musical files over the Internet, as well as download music for offline playback. Some examples of a music file-sharing service are:
Napster is a music file-sharing service that was established and launched on 1st of June, 1999. It typically started the digital music revolution by pioneering peer-to-peer (P2P) file-sharing of digital musical files in the early 2000s.
In conclusion, Napster was the most popular music file-sharing service in the early 2000s.
Read more on file-sharing here: brainly.com/question/6251970