national, difficulties of conquest in, [31-34].
national, effect of nature of the country on, [30].
national, how prevented, [33], [34].
national, invasion difficult in, [144].
offensive, how conducted, [16].
offensive, to reclaim rights, [16].
of expediency, [18].
kinds of, [18].
of extermination, [34].
of intervention, [19].