Translation of cannon in Spanish

We had three more days and the city which was plenty of time if not even too much. It is true that this city is unique and that you can spend there over a month, but we started to miss the countryside.
The first thing he wanted to show us was a war memorial for Cambodia's civil war. The war has ended only few years earlier and was still very present in the mind of the entire population.
Thanks a lot for the correction, they are very helpful and so are you in general. As I mentioned earlier I need more practice to write entire sentences in French and it takes a lot of time.