It reduce the threat of foreign competition for north America
In the natural world limiting factors like the availability of food, water, shelter and space can change animal and plant population
Government policies during the Revolutionary and Napoleonic era contributed to a greater sense of French national identity in the period 1789 to 1815 in various ways.
During the Revolutionary era French people were united to fight for one common idea, they wanted to establish proper French ideals.
Napoleonic era - Napoleon made France one of the most powerful empires in Europe, this led to the ascending the self-confidence of the French nation.
The Japanese government and the army was responsible for the conquest of manchuria
Three wars faught between Rome and Carthage. Hope this helps