Thank you GOG for providing this classic title. I purchased the original on day-one but didn't get into it for whatever reason. Decades later I'm finally able to run it on a modern rig and I've completed the Japanese campaigns. However, I am having a heck of a time with the Marine campaign. I can't even win the first scenario. I've managed to sink a couple of Japanese carriers and I'm finding it impossible to sink more than that before the Japanese air armada overwhelms my own. Please advise!

There is a good walkthrough for Midway and the game in general.

Build a line of defense with your fighters, initially move away the ships from the potential area of the enemy, later form a kettle around the enemy fighters while your bombers attacks the battleships and your ships them afterwards and then move out of sight, better out of their movement range. The carriers were the last objects I attacked.