The indo-madagasgarean republic is the head state of the indo league, and was formed when the states of siri lanki and northern Madagascar merged. With this new power, they then conquered the rest of Madagascar, as well as sothern india. Throgu conquest and Diplomacy, this state forged the Indo League, which includes: Axiom (Puntland and Arabian coastline directly opposite it), Suez (just the canal), Malaysia (as in mainland Malaysia).
A state that is in the commonwealth but isn't under the influence of the Indo-Madagasgarean Republic is Indonesia (OTL Indonesia plus Papua New Guinea and Borneo Malaysia).
Usually in wars the Indo-Madagasgarean Republic wins at sea, stalemate at land, wins in air, but if you cut off its trade, then their ship is sunk. (Pun intended).