Country objects to significant events (9)
I believe the answer is:
landmarks
'significant events' is the definition.
'landmarks' can be an answer for 'events' (landmark is a kind of event). I am not sure about the 'significant' bit.
'country objects' is the wordplay.
'country' becomes 'land' (synonyms).
'objects' becomes 'marks' (I can't explain this - if you can you should give a lot more credence to this answer).
'land'+'marks'='LANDMARKS'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for landmarks that I've seen before include "Prominent features" , "historic events" .)