The flags of Romania have combined the major colors of the arms and flags of
Moldova and Wallachia since 1859. The arms formulated in 1872 were used until
1921. The change in arms reflected the Union of 1 December 1918 which transferred
new areas that were formerly part of the Austro-Hungarian Empire to Romania.
Necessarily, such a change modified all flags that used the arms. The major
changes were the addition of the arms of the House of Hohenzollern, the Crown
of Romania and the dolphins which represent the Black Sea.


This flag was somewhat unique in that it appears to have had a pink
background.
I believe that a range of royals standards were adopted 24-APR-1922, and previosely
the royal standard was a square national flag with full arms and a crown in
each corner (without crowns for the heir prince). Before 1921 no standard for
the queen or queen mother is reported in my sources.
In the additional pages for the Flaggenbuch (1939), it is there.

The following flags are from Flaggenbuch (1939): corvette captain, frigate
captain, rear admiral, vice admiral, and vice admiral as chief of the Naval
Service.






The flag of the War Minister (known later as the Minister of Defense) was the same throughout the Kingdom era. It remained unchanged until around 1952 when a new flag was adopted. Following the collapse of Communism, the government resumed using the traditional flag; however, the font of the "M" was changed.

The flag for use by the heads of other ministeries of the Kingdom of Romania was a square version of the civil flag/ensign or, more simply, a square, tricolored banner of blue, yellow and red.






Like many nations that fought with Germany in World War II, Romania modified
its symbolism in one way or another to either aid in identification or to emulate
its German allies. Romania changed many of its rank flags from the tricolor
to, for lack of a better phrase, a tricolor and cross. These are all based on
images from the Flaggenbuch.