Was Islam spread by the sword?

According to the Quran, "There is no compulsion in religion" (2:256), thus, no one can be forced to become a Muslim. While it is true that in many places where Muslim armies went to liberate people or the land, they did carry the sword as that was the weapon used at that time. 

However, Islam did not spread by the sword because in many places where there are Muslims now, in the Far East like Indonesia, in China, and many parts of Africa, there are no records of any Muslim armies going there. 

To say that Islam was spread by the sword would be to say that Christianity was spread by guns, F-16's and atomic bombs, etc., which is not true. Christianity spread by the missionary works of Christians. Ten-percent of all Arabs are Christians. The "Sword of Islam" could not convert all the non-Muslim minorities in Muslim countries. In India, where Muslims ruled for 700 years, they are still a minority. In the U.S.A., Islam is the fastest growing religion and has 6 million followers without any sword around.