It is a postcard from 1936, with Hitler shaking hands with a lady with the military behind them.
This is a German Kurrent handwriting. When transcribing all letters to a Kurrent font we read:
die besten Grüße vom Reichsparteitag 1936 sendet Franz.
best regards from the Nuremberg Rally 1936 sends Franz
And additional to Takkat's answer the postal address reads:
Frau Karl M [...] rmann
in Kalkar Kr. Kleve
"Kr." is the abbreviation for "Kreis" which is the administrative district.
The surname is hard to read because of the postmark.
"Karl" is of course a male first name, but 1936 it was quite usual to use the first name of the husband in mailing addresses and similar.