Holy Zohar text. Daily Zohar -352.

Tikkun 21 – 93

When the Israelites crossed the sea leaving the Egyptians and Pharaoh’s army swallowed in the sea behind them, it was their breaking of negativity and starting a life of freedom from slavery.
Then they sang the Song of the Sea that is the aspect of the final redemption. They left the bondage of the Egyptians to work on bringing all people of the world to the consciousness of the Israelites, the Torah and the central column.

The Song starts with “אָז יָשִׁיר-מֹשֶׁה וּבְנֵי יִשְׂרָאֵל אֶת-הַשִּׁירָה הַזֹּאת, לַיהוָה”
” Then Moses will sing with the children of Israel this song unto YHVH…”

The song, which is a form of prayer, that was sung after crossing the sea was a connection to the final redemption. Then Moses will lead the Israelites for the final time out of the final exile, which is the blindness and disconnection from the light. Then he will connect זֹּאת, which is Malchut, and the name ADNY to the name YHVH as one יאהדונהי.
The four letters YHVH are for the Holy creatures of the upper chariot and four letters of ADNY represent the four holy creatures of the lower chariot. The eight letters are represented by the word אז, with numerical value of 8 and is the first letter of the song. It implies to the unification of the upper and lower levels as one.
The song has 10 levels that will ascend to Keter and pave the way to Mashiach to come down.
Like the days before the Exodus, we will have to break negativity and wars will come to be on all four levels on the upper and lower levels. This explains the verse that we recite at the end of every connection.
“עוֹשֶׂה שָׁלוֹם בִּמְרוֹמָיו, הוּא בְרַחֲמָיו יַעֲשֶׂה שָׁלוֹם עלינו ועַל כָּל יִשְׂרָאֵל”
“The maker of peace in heavens, with his mercy will make peace on us and on all Israel”
The word for peace in Hebrew שָׁלוֹם is and comes from the same root as the word שלם ‘complete’ and ‘whole’.

The wars are ways of the negativity to connect to the light. Since they do not have light of their own, they make war against those who are connected to it and have the light with them. They will conduct wars on all four levels of the name ADNY, אדני. Mashiach will come at the final stage of the process when all will be under great suffering. He will rule earth and remove all negativity.

Once they are removed, the way for the final unification will be cleared and YHVH will unite with ADNY forever. The light and the vessel will be one. As it is said in Zecharia 14:9
“ וְהָיָה יְהוָה לְמֶלֶךְ, עַל-כָּל-הָאָרֶץ; בַּיּוֹם הַהוּא, יִהְיֶה יְהוָה אֶחָד–וּשְׁמוֹ אֶחָד”
“And YHVH will be King over all the earth; in that day shall YHVH be One, and His name one”

When the light of the unification will begin to flow, the process of the resurrection of the dead will begin.