"with the sharp part of the sword." The "edge of the sword" is associated with death and complete destruction. AT: "and completely defeated them" (See: [[rc://en/ta/man/translate/figs-metonymy]])
"the Ammonites ... the Amorites" or "the people of Ammon ... the people of Amor." These names are similar, but they refer to two different people groups.
# was fortified
"was strongly defended." The Israelites did not attack the Ammonites.