Egyptian Kingdom Flag
In Raiders of the Lost Ark 1981 Steven Spielberg and George Lucas did their vexillological homework and had the proper Egyptian flag flying in the background. The Green Kingdom Flag of Egypt consisted of a green field with a crescent moon and three five pointed stars in between the horns. Although it may seem like a dominantly Islamic flag - the three stars represented the three major branches of Abraham - Judaism, Christianity, and Islam.
Gun versus Sword, its no match
The flag is barely visible during the famous gunslinger vs swordsman fight. Although it gives the impression that firearms technology was new to the Middle East - they had been using gun powder since the 1400s in concert with Europe.
Best Image of Egyptian Kingdom Flag
Raiders of the Lost Ark 1981
The best image of the Green Egyptian flag takes place after the Indy amazingly captures the Lost Ark and is able to hide it at the town bazaar where he had previously fought the swordsman.