1928
Appearance
| File:Decade.png ( 1920s: ) 1928 link | |
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| File:Kellogg–Briand Pact.jpg The Kellogg–Briand Pact raised hopes for a permanent peace |
1928 is the dividing line in arbitration about the legality of invasions, due to the Kellogg–Briand Pact. This outlawed "disputes or conflicts of whatever nature or of whatever origin they may be, which may arise among them" and so territorial gains by conflict before that time are honoured, subsequent conquests are (in theory at least) illegal.