Moses and the Israelites.
The Israelites miraculously crossed the dry seabed of the Sea of Reeds (Exodus 14), which is not necessarily the same as the Red Sea.
It did not protect the Egyptians at all, as soon as the Israelites crossed the red sea , and the Egyptians followed them the waters drowned them all.
The Jordan River (see Joshua 3-4). They crossed the Red Sea in Exodus.
They didn't cross any oceans. The Torah says they crossed the Sea of Reeds (ים סוף). This sea is often mistakenly called the Red Sea.
They left egypt and they crossed the red sea and the travelled the desert for forty years
This has been a mistranslation. Moses never crossed the RED SEA - he crossed the SEA OF REEDS. The Israelites were being pursued by a vengeful Pharaoh's army, and were trapped with this sea in front of them. Moses prayed, and God caused the waters to part - allowing them to cross safely. The Egyptian army followed, but God caused the waters to close up again, causing the total destruction of the Egyptians and finally freeing the Israelites fromtheir slavery.
The priests
Moses The Crossing of the Red Sea forms an episode in the biblical narrative of The Exodus. It tells of the escape of the Israelites, led by Moses, from the pursuing Egyptians, as recounted in the Book of Exodus. Moses holds out his staff and God parts the waters of the Yam Suph. The Israelites walk through on the dry ground and cross the sea, followed by the Egyptian army. Once the Israelites have safely crossed Moses lifts his arms again, the sea closes, and the Egyptians are drowned.
We cannot know the exact width at that time, because a river is constantly changing; but we do know that it was overflowing it's banks at that time, thus making it wider than normal (as seen in Joshua 3:15). Also, it should be noted that the Israelites crossed through it on dry land miraculously with God's help similar to when they crossed the Red Sea when fleeing from the Egyptians.
Yam Suph (ים סוף in Hebrew, meaning "Sea of Reeds") is generally identified with the Red Sea. According to the Hebrew Bible, the Israelites crossed over from Egypt proper to the Sinai Peninsula. The sea was split by God, Moses led the Israelites from one shore to the other on the newly exposed, dry seafloor. After the Israelites had finished crossing, God brought the waters down on the pursuing Egyptian soldiers, causing them to drown.
The festival of Passover.See also:More about Passover