This ad, circa 1985, is for a game called Barbarossa for the TRS-80 Color Computer. This is a turn-based strategy game that covers the German invasion of the Soviet Union during World War II.
This game was developed and released by a company called Ark Royal Games. They were primarily known for their war games on the Color Computer, both historical and futuristic. However, they also developed a few other types of games as well including some adventure games.
I don't know too much about this game so I'll let the ad speak for itself:
"The War in Russia 1941-44
The first 64K wargame for the color computer. Barbarossa is total machine language so it's fast! Completely hi-res so it's beautiful. Scrolling map takes up more than two screens. Bit mapping allows for hi-res picto-character set consisting of panzer, grenadier, airflottes, infantry, mechanized infantry, Russian armor and infantry. Commands include Normal Movement, Blitzkreig attack, Cityscan, Intelligence, Air Operations, Scrolling, Group transfer, Advance 2nd movement, Game save.
Player controls the German forces consisting of Army Groups North, Central and South, and must capture 16 Russian cities to win. In doing so he battles terrible weather conditions, attrition, Russian reserves and supply shortages."
The disk version was $33.95 and the cassette version was $30.95. The ad says that they are different but not in what way. Presumably the disk version is better.
Read more: https://www.megalextoria.com/wordpress/index.php/2017/12/08/barbarossa-trs-80-color-computer/