"Squad Leader", released in 1977, used a semi-simultaneous system as well, focusing on infantry combat. The physical components for the game were unmatched in terms of quality, using full color painted mapboards on rigid mountings that had the added advantage of being geomorphic. As the "Squad Leader" game system grew and more boards were added, they could be set up in a variety of configurations and used to represent a wide array of units, as the infantry counters were generic and did not portray specific units. Some innovative rules for such things as leadership and "penetrating fire" (to simulate the ability of automatic weapons on the battlefield to engage more than just one target) were introduced.