Possible Clues:

• ... one seen as atrocity by so-called Egyptian leader
• Conflict settled by the Treaty of Paris in 1856
• Man aircrew shot in conflict with Russia
• 1850s conflict
• Conflict in 1853-56
• "The Charge of the Light Brigade" setting
• Conflict follows article on misdeed
• Sadat following evil act causes conflict
• Air crewman prepared for action once
• Hostilities between 1853 and 1856