Surah 26:60-67 says: "So they pursued them at sunrise. And when the two bodies saw each other, the people of Moses said: "We are sure to be overtaken." (Moses) said: "By no means! my Lord is with me! Soon will He guide me!" Then We told Moses by inspiration: "Strike the sea with thy rod." So it divided, and each separate part became like the huge, firm mass of a mountain. And We made the other party approach thither. We delivered Moses and all who were with him; But We drowned the others. Verily in this is a Sign:" (Yusuf Ali)
Jehovah's Witnesses believe indeed that the events that took place at the Red Sea at this time are a sign for later generations. This is a sign, or a prophetic picture, of what will take place at Armageddon.
There are a number of things to consider. In the parallel account in the Bible, in Exodus 14:13-14 we are told: "Then Moses said to the people: “Do not be afraid. Stand firm and see the salvation of Jehovah, which he will perform for you today. For the Egyptians whom you do see today you will not see again, no, never again. Jehovah will himself fight for you, and you yourselves will be silent.”"
At Armageddon, God's people on earth will not be required to fight their enemies. God himself will fight for them.
And Exodus 14:10 says: "When Pharaoh got close by, the sons of Israel began to raise their eyes and here the Egyptians were marching after them; and the sons of Israel got quite afraid and began to cry out to Jehovah."
At Armageddon it will seem, to all appearances, that God's people are trapped with no way out. This was the situation with the Israelites who had Pharaoh's army behind them in hot pursuit and the Red Sea in front of them, blocking their way. From a human standpoint it looked as if their was no escape for them. But this was a test of their faith. They had to exercise complete trust in God that he would protect them by his miraclous power.
In Exodus 14:17-18 God says: “As for me, here I am letting the hearts of the Egyptians become obstinate, that they may go in after them and that I may get glory for myself by means of Pharaoh and all his military forces, his war chariots and his cavalrymen. And the Egyptians will certainly know that I am Jehovah when I get glory for myself by means of Pharaoh, his war chariots and his cavalrymen.”
Similarly Revelation 17:17 says: "God put it into their heart to carry out his thought".
God is in complete control and will cause the enemies of his people to act in exactly the way that will lead to their own ruination. At the climax of the events even these enemies will have to acknowledge that God is supreme and glorious.
And one last thing to note: At Armageddon there will be no neutral ground. Everyone will be either for God's people or against.