Complex sentence: After the fall of the Mahodayapuram Cheras in the 12th century, along with numerous other provinces Perumpadappu Swarupam became a free political entity, but only after the arrival of Portuguese colonizers on the Malabar Coast did the Perumpadappu Swarupam acquired any political importance.
Split into simpler sentences: After the fall of the Mahodayapuram Cheras in the 12th century, along with numerous other provinces Perumpadappu Swarupam became a free political entity. However, it was only after the arrival of Portuguese colonizers on the Malabar Coast did the Perumpadappu Swarupam acquire any political importance.