The phrase “Next Year in Jerusalem” is said throughout the cycle of the Jewish year. The phrase expresses a millennia-old prayer and hope that has been said by Jews all over the globe. “Next Year in Rebuilt Jerusalem” expresses the yearning and desire to return to Jerusalem and build it up.
The expression is said at the end of the Neilah prayer of Yom Kippur, at the end of the Hagaddah, at the end of Israel Independence Day, and on Jerusalem Day. When the Jewish people left Egypt, they took their first steps towards their destination: the land of Israel and Jerusalem. Ever since then, that journey continues and every generation throughout the years has prayed “Next Year in Rebuilt Jerusalem”
At the end of the Seder night, we happily say Hasal Siddur Pesach… (“Completed is the Seder of Pesach, according to its law, all its judgment, and statute.”) and we add, “Just as we merited to have a Pesach Seder, so may we merit to bring the Pesach offering.”. Not only do we want to do the Seder and talk about it, but we also want to practically do the Pesach (offering). Where? In Jerusalem, in the temple- in rebuilt Jerusalem.

The Exodus from Egypt was what turned us into a people. Therefore, Jewish people from all over the world read the Haggadah and eat Matzahs, as one huge family. throughout the generations, the Jewish people wanted to be free and to reach the most important place to them: Jerusalem. Next year in rebuilt Jerusalem.
The Exodus from Egypt is mentioned in over thirty mitzvot/commandments that the Jewish people are expected to keep. It features throughout the year via the festivals and special times; the festival of Sukkot and the Clouds of Glory, Tefillin, loving the convert, releasing servants, bringing the first fruits to the Temple, and more.  The Jewish people were servants in Egypt and left after G-d struck Egypt and released them through wonders and miracles. The Jewish people escaped to the desert but the Egyptian people chased after them. In the end, the Egyptians drowned in the Red Sea, while it simultaneously split into two so that the Jewish people could cross it safely. The commandment to remember the Exodus exists throughout the year; Pesach is special in that there is a special commandment to tell the story of the Exodus from Egypt on Pesach itself. The remembrance connects the present to the past and to the long chain of generations that told the story and remembered the Exodus from Egypt.

The Bordeaux Haggadah was written and illustrated in Bordeaux, France in 1813, by the brothers, Isaac and Jacob Soreph. The Haggadah is written in Hebrew and is translated to French. Most of the illustrations were copied from the Amsterdam Haggadah of 1712, but some of the original illustrations emphasize the centrality of the Haggadah story and yearning for Jerusalem. A unique aspect of the Haggadah are the maps that feature in it, especially a map of Jerusalem that is surrounded by Temple utensils and a picture of the Kohen Gadol- High Priest. The illustrations provide a glimpse into the world of the Jewish community of Bordeaux, which was established after the Expulsion of Jews from Spain. At the time of the writing of the Haggadah, the community already numbered over two-thousand Jewish people.

The Haggadah ends with a section that is called “Nirtza” and with Hebrew words that translate to mean, “Completed is the Seder of Pesach according to its law, according to all its judgment and statue.” A liturgical poem is recited and the final phrase is “Next year in rebuilt Jerusalem.” This phrase is considered a prayer for redemption; just as we merited to hold a Pesach Seder here in exile, so too we should merit to do so in Jerusalem.
The earliest evidence for saying, “Completed is the Seder of Pesach…” and “Next Year…” is in the book “Leket Yosher” from the second half of the fifteenth century. From around that time, it is common to find Ashkenazic manuscripts that contain the words, “Next Year in Jerusalem.”
Later on, in the liturgical poem of Nirtza, there is a Hebrew phrase that can be translated to mean, “Pure One, who dwells in the heavens,” and there are those who understand the Hebrew word used for heavens to mean Jerusalem, so the phrase would mean “G-d (the Pure One) who dwells in Jerusalem.
Also, “the assembly that cannot be numbered”- “The assembly” refers to the Jewish people.
In addition, “the ones you planted” also refers to the Jewish people.
“Redeemed, to Zion, in joy.” The Jewish people will freely and happily come to Jerusalem
 

"The Jewish Brigade” was set up in the Second World War as a military formation in the British army that was entirely made up of Jewish people- mainly Yishuv Jews from Pre-State Israel, as part of the Yishuv’s volunteering in the British army in the Second World War.
Moshe Sharett, the head of the political section of the Jewish Agency, was one of the initiators of the setting up of the brigade. This was the first British army formation in the Second World war in which all the soldiers and officers were Jewish people from Israel, with a Jewish atmosphere, Zionist symbols, that fought against Nazi Germany. The establishment of the Brigade had huge national significance.
The Jewish Brigade fought in the battles for breaking the last German line of defense in northern Italy. At its peak, the brigade had about 5,0000 soldiers. After the battle in Italy, the brigade was active in Europe, offering assistance to Holocaust survivors, arranging their escape, and immigration to the land of Israel. Many of the IDF officers in the War of Independence, acquired their combat and leadership experience in the brigade.