tactics = Taktik
German used blitzkrieg tactics on Poland during the lightning war.
You forgot to specify what war are you interested in. In the First World War the tactics was 'blitzkrieg' (German word for 'lightning war). It was based on the Schlieffen Plan which was drawn up in 1905 by General Count Alfred von Schlieffen.
To patrol (look for) merchant vessels in the sea lanes.
Chre is not a German word
what is the literal meaning of the word tactis
"mit" is the German word for "with".
The German word for their is "Ihre."
The word FROM in German is von
The German word for he is er.
The word for is in German - " ist "
The German word for "Who" is "Wer".
The German word for when is wenn.