According to the Oxford Dictionary, the word martial means "relating to fighting or war". According to the Etymology Dictionary , the word martial comes from the name of the Roman god of war, Mars."The Roman god of war, apparently from earlier Mavors, related to Oscan Mamers. He also had agricultural attributes, and may ultimately have been a Spring-Dionysus." "Although Mars was viewed primarily as a destructive and destabilizing force, Mars represented military power as a way to secure peace, and was a father of the Roman people." in words of Wikipedia.
Other words referring to mars are martian or martially. We can see the use of the word martial in this article.