This is an injection-plastic military vehicle model kit.
From the manufacturer:
The Sherman family of tanks was the mainstay of the Allied forces during World War II. They saw extensive service in every theater of the war. While the Sherman had less armor and a smaller main gun, they were produced in such great numbers that they overwhelmed the enemy. The turret-mounted T34 "Calliope" rocket launcher could fire rockets in sequence or all at once. Can be built with or without the rocket launcher; hatches open and turret rotates, and includes a driver figure and 2 crewmen figures.