Some flag facts about the flag of Swaziland:

The Swaziland flag design depicts a shield and two spears, symbolizing protection from the country’s enemies
The black and white shield represents the peaceful coexistence of white and black people in Swaziland
The shield is an Emasotsha shield
Flag is based on one given by King Sobhuza II to the Swazi Pioneer Corps in 1941
The color red in the flag design represents past battles, the blue represents peace and stability and the yellow represents the natural resources of Swaziland
Offically adopted on October 6, 1968