What Happened in Suratutobah?

In Suratutobah, the Muslims were about to face the challenge they've never faced before. The Romans have been offended by the letters sent by the prophets of the Lahari Sodom. They're amassing a military force of about 100,000 reportedly that's coming for the Muslims. This is what you call the time of a draft. No longer were the Muslims being asked to volunteer.