a frog slips away into
the sound of water.
See? 5-7-5 is just too much room for our Angl0-Saxon words to wiggle around in. The prepositions are unnecessary and overdone--they focus us too much on the moment, a HUD of poetic attention. And that "away"--ick, so much metaphysic in that word. Again, as well, the trouble with the articles--should any of these activities and objects be definite? Or indefinite? Or is the indeterminacy the key of the original (this frog here, and also all frogs at all times everywhere)?
And finally, ugh, the syntax ("the arrangement of the army") puts us into a lockstep lemming-like march to that final period, where we all plop in with the frog, only we can't breathe underwater...