Short answers, pulled from the story.
Napoleon Bonaparte began the siege of Jaffa on March 3 at noon. French forces attacked Ottoman defenses that same day while an officer and trumpeter delivered a surrender message to the governor.
Napoleon Bonaparte ordered the execution of approximately 4,100 Ottoman prisoners who were mostly Albanians. He decided to kill them rather than feed or guard such a large group following the capture of the city on March 7.
Ahmed al-Jazzar decapitated both the officer and trumpeter who delivered a surrender message on March 3. He displayed one head upon the city walls as a response to their attempt to negotiate peace.
A plague epidemic broke out among French troops stationed in Ramla due to poor hygiene conditions. The disease spread rapidly through both the local population and the invading army forcing Napoleon to leave entirely.
Only twenty officers survived the purge while the rest perished under orders from their former captors. Around 4,100 men were shot or stabbed to death over three days near the seashore.