One the main and principled political and ideological elements of the Revisionist Movement founded by Ze'ev Jabotinsky is the claim for the integrity of the homeland.
In a practical sense, that meant that the Palestine Mandate should have extended to both sides of the Jordan River, instead of Article 25 of the Mandate decision allowing Great Britain to postpone the application of the reconsitution of the national Jewish homeland east of the Jordan River.
Jabotinsky wrote the words to a song on the matter.
A map representing the demanded borders was always prominent
And the Irgun adopted it as well.
Well, now I've found a Telegram account in Jordan and look at the map:
^