Canadian frontier work was developed by Canadian historians Harold Adams Innis and J.M. S. Careless. They highlighted the relationship between the center and the periphery. Katerberg argues that «in Canada, the imaginary West must be understood in relation to the mythical power of the North.» [Katerberg 2003] This is reflected in Canadian literature by the term «garrison mentality.» In Innis` 1930 work, The Fur Trade in Canada, he explained the so-called Laurentian thesis: that the most creative and important developments in Canadian history took place in the metropolises of central Canada, and that the civilization of North America is the civilization of Europe. Innis considered the site crucial to the development of Western Canada and wrote about the importance of metropolitan areas, colonies, and Indigenous peoples in creating markets. The party who picks up the goods on behalf of the buyer usually travels through the customs border and imports the goods. Borders and borders also involve different geopolitical strategies. In ancient Rome, the Roman Republic experienced a period of active expansion and the creation of new borders. From the reign of Augustus, the Roman borders were transformed into defensive borders that separated the Roman and non-Roman empires.  In eleventh-century China, China`s Song Dynasty defended its northern border with the nomadic Liao Empire by building a vast man-made forest. Later, in the early twelfth century, the Song Dynasty entered the Liao and dismantled the northern forest, thus transforming the former defense frontier into an expansionist border.
 The border was strictly guarded in front of the wild tribes that seemed to occupy the desert lands of northern Europe. .