The federation of which one of the following States has been described as ""An indestructible union of indestructible states""?

The American Federation is famously described as "an indestructible Union of indestructible States" [2]. This characterization was solidified by the United States Supreme Court in the landmark case of Texas v. White (1869), where Chief Justice Salmon P. Chase declared that the Constitution looks to a perpetual and indissoluble union. Unlike the Indian federation, which is described as an "indestructible Union of destructible states" because the Parliament can redraw state boundaries without their consent [3], the U.S. system is based on a compact where the national government cannot unilaterally alter state boundaries or existence [3]. This principle emerged from the American Civil War context, affirming that states have no legal right to secede and that the union is permanent. Consequently, the U.S. represents a federation where both the central entity and the constituent units possess an indestructible constitutional status.

Sources

1. [1] Laxmikanth, M. Indian Polity. 7th ed., McGraw Hill. > Chapter 14: Federal System > til States Not Indestructible > p. 140
2. [2] Indian Polity, M. Laxmikanth(7th ed.) > Chapter 14: Federal System > til States Not Indestructible > p. 140
3. [3] Introduction to the Constitution of India, D. D. Basu (26th ed.). > Chapter 6: TERRITORY OF THE UNION > Formation of new States and Alteration of Boundaries, etc. > p. 77