What is propaganda? what was the effect of government propaganda on nearly every nation at war in 1914?

soldiers are depicted in heroic scenes or scenes of reflection; soldiers seem to be very positive, protective, & proud to be part of the military; there is 1 scene of a soldier reflecting on the loss of his fallen comrades, but even then he appears proud of the sacrifice his fellow soldier has made

Idk but i hope you figure it out : )