"On the Liberty of the Rhodians" makes the case for Athenian intervention in Rhodes, though makes no specific proposals as to what form that support might take – other speakers in favour of intervention were presumably expected to make such proposals, and Demosthenes' speech would have been to support those. Athens in the end did not intervene in Rhodes.
"On the Liberty of the Rhodians" advocates for Athenian intervention in Rhodes, but offers no specific suggestions on how such support should be provided – other speakers supporting intervention were expected to propose concrete plans, and Demosthenes' speech was intended to bolster those proposals. Athens ultimately did not intervene in Rhodes.