(A) ** inexperienced
(B) veterans of many battles
(C) scared
(D) the color of the uniforms
EXPLANATIONS BELOW
Concept note-1: -adjective. If you say that someone is green, you mean that they have had very little experience of life or a particular job. He was a young fellow, very green, very immature. Synonyms: inexperienced, new, innocent, raw More Synonyms of green.
Concept note-2: -When it was first used in the early 15th century, it referred to a young ox or bull-since these animals were ‘green’ or inexperienced and their horns hadn’t matured, they were called ‘greenhorns’. The following century, new army recruits began to be called ‘greenhorns’.
Concept note-3: -This small break is also a huge milestone for your soldier’s accomplishments. This event is called Turning Green and is also known as Family Day. Turning Green Ceremony signifies that the soldiers have officially earned the title U.S. Army Soldier.
Concept note-4: -6 years ago. Green as a slang means to not have a lot of knowledge for a given subject. Think of a newly spouted plant. It is now in a world where everything is new to it and it must learn to adapt. Green= fresh; when information is fresh, or you have just learned the information you are not an expert over the subject.