Soldiers were deployed along or to the boarder of the country.
In the above sentence, should I use deployed along or to? What difference does each preposition make?
Either choice is correct and idiomatic. As you guessed, the meaning is different. A picture is worth a thousand words:
"To" suggests that they were all sent to the same location, somewhere on the coast.
"Along" would suggest that the soldiers were strategically placed to cover the whole length of the border.
PS It's spelled "border" - a "boarder" is someone who lives in your spare room.