Tank Brigade is a game for the Atari 2600. It was originally produced by Panda Software, (Panda Sotware #101), but was later rereleased by Zimag under the name Tanks But No Tanks. It's rarity is ranked 6, (rare+) by atariage.com with an estimated value of $20 - $30.
Tank Brigade is a close copy of Atari's own Combat. (Why someone would want to rip off the game that came with the system I will never know).