Sardinia goes south during the 1848 revolutions

Instead of fighting a war with the Austrians , Could the Kingdom of Sardinia annex the Hapsburg ruled states of central Italy

Would Austria invade to restore them

Could Sardinia annex the Papal states and the Kingdom of the Two Sicilies as well
 
IOTL: All Italian states were undergoing their own revolutionary phase. They were all initially fine with joining Sardinia in the war with Austria, though the courts were between lukewarm and hostile; they could not resist the "popular"* pressure.
So no, invading and annexing "allies" was not going to fly. Perhaps Sardinia could have gotten away with a takeover of Parma in a different context, but that's about it.

*As in, primarily by the urban middle class.
 
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