Simplify the following text for a Grade 5 native English-speaking person.
Original: This demand precipitated a crisis in relations between Egypt and Hatti when Ramesses denied any knowledge of Mursili 's whereabouts in his country , and the two Empires came dangerously close to war .
Simplified: This caused a crisis between Egypt and Hatti , when Ramesses said he did not know where Mursili was . The two empires came close to war .