Gad chose land east of the Jordan. The Hebrew blessing in Genesis 49:19 puns on the name — gad sounds like gedud, a raiding band. Targum Pseudo-Jonathan expands the pun into a battlefield.
"The tribe of Gad with the rest of the tribes will, armed, pass over the streams of Arnona and subdue before them the pillars of the earth, and armed will they return into their limits with much substance and dwell in peace beyond the passage of Jardena" (Genesis 49:19).
The Targum is reading all the way forward to the conquest under Joshua. When the tribes of Israel finally entered the land, Reuben, Gad, and half-Menasheh had already asked for territory east of the Jordan, in the fertile plains of Gilead (Numbers 32). Moses made them promise: fine, but you cross the Jordan first, armed for war, and you do not rest until your brothers have their inheritance. They kept the promise. Joshua 22 records their return — armed still, and laden with spoil from the campaign — back to their own fields.
The Aramaic ends on a note of rest. "Dwell in peace." A tribe that had fought for someone else's land finally got to put down the sword and keep its own.