+Simple Subject and Predicate+--_Soldiers obey._
_Object_ added--Soldiers obey _orders_.
_Adverb_ added--Soldiers obey orders _quickly_.
_Phrase_ added--Soldiers obey orders quickly and _without
question_.
_Clause_ added--Soldiers obey orders quickly and without question
_because they are taught to do so_.
Combining our enlarged subject and predicate we have the sentence:
The enlisted soldiers in the trenches, who are doomed to die, obey
orders quickly and without question because they are taught to do so.
This is a complex sentence because it contains dependent clauses. We
might add another independent clause and make of this a compound
sentence. For example:
The enlisted soldiers in the trenches, who are doomed to die, obey
orders quickly and without question because they are taught to do so,
and _this is patriotism_.