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Should the Oregon question lead to hostilities between the United States and England, the theatre of war would embrace the greater part of North America and the two oceans, but the theatre of operations would probably be limited to Canada and our northern frontier, with naval descents upon our maritime cities.
The first point to be attended to in a plan of military operation is to select a good base. Many circumstances influence this selection, such as mountains, rivers, roads,ngly-fortified places; the Pyrenees, with Bayonne at one extremity and Perpignon at the other; the triple range of fortresses on the Belgian frontier — are all permanent lines of defence.
The St. Lawrence river is a permanent line of defence for Canada; and the line of lake Champlain, the upper St. Lawrence, and the lakes, for the United States.
Temporary lines of defence are such as are taken up merely for the campaign.
Napoleon's position in Saxony, in 1813; the line of the allies in Belg