Flag of Germany
When Heinrich XI, Prince Reuss of Greiz was appointed by Joseph II, Holy Roman Emperor to rule the then-new Principality of Reuss-Greiz on 12 May 1778, the flag adopted by the "Fürstentum Reuß-Greiz" was the first-ever appearance of the black-red-gold tricolour in its modern arrangement in any sovereign state within what today comprises Germany – the Reuss elder line that ruled the principality used a flag whose proportions were close to a "nearly square"-shape 4:5 hoist/fly ratio, instead of the modern German flag's 3:5 figure.
Iron Cross
The Black Cross was used on the naval and combat flags of the German Empire.
The Black Cross was used as the symbol of the German Army until 1915, when it was replaced by a simpler ".
The of the Weimar Republic (1921–35), the of Nazi Germany (1935–46) and the (1 October 1956 to present) also inherited use of the emblem in various forms. The traditional design in black is used on armored vehicles and aircraft, while after German reunification, a new design in blue and silver was introduced for use in other contexts.