There were several episodes involving space combat between the Interplanetary Space Force and various enemies. After the Space Angel and his crew had discovered the villains’ plans or forces, he would call in reinforcements made up of one or more squadrons of the ISF. Squadrons were organized by planetary patrol areas such as the Venusian Squadron, Mars Squadron, etc. The identifying squadron symbols on the ISF ships were the ones used in astronomy charts of the time to identify the planets, such as the Female symbol for the Venusian Squadron, the Male symbol for the Mars Squadron and a circle with an enclosed plus sign for the Earth Squadron.
