Expression: get in step with the new proposal

[Learning_English]

I could not make Jim get in step with the new proposal. He marches to a different tune than you and I.

Could anyone explan me the expression in bold? [Particularly the phrase "get in"]
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[Alan]

Hi,

When soldiers march, they have to do this in step with one another. Otherwise they would bump into one another. In other words their left and right feet have to march at the same time. When this happens they are said to be in step. If one soldier is marching at a different speed, he has to get in step, in line with all the others. In your sentence the expression 'get in step with' suggests 'accept and agree with the proposal (suggestion)' He has to follow the same ideas that everyone else has accepted.

Alan
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English as a Second Language
You can read my ESL story Guy Fawkes Night for You