the may crisis of 1938 was a false alarm caused by rumors that czechoslovakia would be invaded the weekend of the municipal elections in that country , erroneous reports of major german troop movements along the czechoslovak border just prior to the elections , the killing of two ethnic germans by the czechoslovak police , and ribbentrop 's highly bellicose remarks to henderson when the latter asked the former if an invasion was indeed scheduled for the weekend , which led to a partial czechoslovak mobilization and firm warnings from london against a german move against czechoslovakia before it was realized that no invasion was intended for that weekend .