was he involved in any war?
No.
Norman Rockwell
In 1943, during World War II, Rockwell painted the "Four Freedoms" series,
who created the freedom of worship (painting)? Norman Rockwell. when did he start painting? At the age of 19.
wiki:11625144
Norman Rockwell [SEP] World War II
In 1943, during World War II, Rockwell painted the "Four Freedoms" series, which was completed in seven months and resulted in him losing fifteen pounds. The series was inspired by a speech by Franklin D. Roosevelt, wherein Roosevelt described and articulated Four Freedoms for universal rights. Rockwell then painted "Freedom from Want", "Freedom of Speech", "Freedom of Worship" and "Freedom from Fear". The paintings were published in 1943 by "The Saturday Evening Post". Rockwell used the Pennell shipbuilding family from Brunswick, Maine as models for two of the paintings, "Freedom from Want" and "A Thankful Mother", and would combine models from photographs and his own vision to create his idealistic paintings.