After a long peace--and in democratic ages the periods of peace are long--the army is always inferior to the country itself.
Thus not only does a long peace fill an army with old men, but it is frequently imparts the views of old men to those who are still in the prime of life.
After a long peace, Jaroslaus, the great grandson of Igor, resumed the same project of a naval invasion.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "long peace" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.