Dive Bombers were essential in WW2. Germany used them to attack buildings to knock a countries communications and air force. the US used them to attack Japanese Carriers and Battleships and they were all but not important in the Battle of Stalingrad for attacking the other sides troops. because of their importance in WW2, I think they should be a unit. they would be useful against troops, buildings and Naval Units, but weak against other aircraft. but because of their wide range, they would be weaker than the current planes, but still do very well. they would be a great boost for the time period.