The gates of the land. The phrase might mean either the cities in general (comp. Micah 5:5; Isaiah 3:26) or the fortresses commanding the entrance into the land (comp. Nahum 3:13). The context decides in favor of the latter view.
Ewald's explanation, "borders of the earth" (i.e. the most distant countries), seems less natural. I will bereave them, etc. The proper object of the verb is my people (personified as a mother). The population are to fall in war (comp.
the same figure in Ezekiel 5:17). The tense is the perfect of prophetic certitude; literally, I have bereaved, etc.