Exodus -41 and Galatians both say 430 years whereas Genesis says 400 years.
The difference is easy to understand because God was speaking to Abraham in general times looking forward and the other two were quite specific times looking back.
With all the factual errors in the classic 4 hour Hollywood movie, "THE TEN COMMANDMENTS" with Charlton Heston, the spectacular scene where Pharaoh army are drowned before his eyes and he drops his staff is exactly correct!
through the pillar of fire and cloud and brought the army of the Egyptians into confusion.
Their leading troops were left behind, Their legs made no stand except to flee, Their archers abandoned their bows, The hearts of their runners grew weak as they sped, They loosened their water-skins, cast them down, Their packs were untied, thrown away.
The vile chief, the Libyan foe, Fled in the deep of night alone, No plume on his head, his feet unshod, His wives were carried off from his presence, His food supplies were snatched away, He had no drinking water to sustain him.
He has become a [proverbial saying] for Libya, Generation says to generation of his victories: It was never done to us since the time of Re;" So says every old man speaking to his son.
Woe to Libyans, they have ceased to live In the good manner of roaming the field; In a single day their stride was halted In a single year were the Tjehenu burned!
The eye of every god is after her despoiler, It will make an end of all its foes", So say they who gaze toward their stars, And know all their spells by looking to the winds.Recital of his victories in all lands, to let all lands together know, to let the glory of his deeds be seen: the King of Upper and Lower Egypt: Banere-meramun; the Son of Re: Merneptah, Content with Maat; the Bull, lord of strength who slays his foes, splendid on the field of valour when his attack is made: Shu who dispelled the cloud that was over Egypt, letting Egypt see the rays of the sun disk.Who removed the mountain of copper from the people's neck, that he might give breath to the imprisoned folk.He caused their chariot wheels to swerve, and He made them drive with difficulty; so the Egyptians said, Let us flee from Israel, for the Lord is fighting for them against the Egyptians.Then the Lord said to Moses, Stretch out your hand over the sea so that the waters may come back over Notice God "shook off" Pharaoh but didnt' kill him: "But He overthrew Pharaoh and his army in the Red Sea" (Psalm 1) The Hebrew word for "overthrew" is literally "shook off" and is metaphoric of ridding the Hebrews of Pharaoh's control.