Until 1868 different groups of German states used differing varieties of feet and inches, pounds and ounces, etc. The details are very complicated, especially as some of the German states used more than one set.
The benefits derived from metrification were measurements that could be divided by ten. This method simplified the way to figure measurements.
70 mph on four-lane rural sections.
the German mark
The mark.
Sussex Pledge
Germany had surrendered before the bomb was operational.
Based on your use of the English spelling of Litre and not the American spelling (liter), I'm going to assume imperial measures: 1 gill = ¼ pt = 5 fl oz ≈ 142.1 ml The standard measure for spirits in an English pub was 1/6 gill or 23.7 ml before "metrification" when it was made 25 ml or 35 ml (decided by the publican).
Before the initial stages of World War 2 the communist party had control in Germany. Therefore Germany was communist before Hitler turned Germany into a dictatorship.
Yes, Germany used both (at least in World War 1 - zeppelins were phased out of military use before World War 2).
Germany
The currency in Germany before the advent of the euro was the German mark. Germany began using the euro in 2002.
The capital city of Germany before Berlin was Bonn, from 1949 to 1990.