Excerpts from Books and Wikipedia
Having taken Acre, Richard hoped to press on to Jerusalem. Saladin was determined to stop him. . . . The Crusaders, attempting to march along the Palestine coast, were attacked by the more mobile Saracens but were able to reach and occupy the town of Arsuf. . . . The Crusaders were able to maintain formation and march under fire to Arsuf." [Battles of the Medieval World]