The term 'Army Animal' can be solved by the word 'OCTOPUS', which is a seven-letter word. Octopuses are marine animals that belong to the cephalopod family, which also includes squid and cuttlefish. They are known for their eight arms and their ability to change color to blend in with their environment. Octopuses are found in many oceans around the world and have been used as symbols of strength and intelligence in many cultures.