string along vs march on

string along and march on both are verbs.

Word	Noun	Adjective	Verb	Adverb
string along	No	No	Yes	No
march on	No	No	Yes	No

As verbs, march on is a hypernym of string along; that is, march on is a word with a broader meaning than string along:

Other hypernyms of string along include advance, go on, move on, pass on, progress.

string along (verb)	march on (verb)
move or come along	move forward, also in the metaphorical sense