Hellfire
Prince
Course that tactic doesn't work if you don't get advanced flight until you get the superconductor 
Paratroopers and marines require specific situations but there are so many ways to avoid those situations that they aren't useful.
1) You have to have no railroads between you and your target to use paras or airdrop infantry. Otherwise use tanks and MA. Helicopters would be extremely useful for setting up defenses in undeveloped areas, but there are few undeveloped areas by the time you get advanced flight.
2) You have to have to have a coastal city or unit you want to attack to use marines, otherwise just drop your units next to their city and wait a turn and listen to the AI gripe about them being there but not be able to do much about it. Also that coast city should not have MIs, or its basically suicide.
3) Neither paras nor marines are of much use fighting against MI, so they are only useful at the very very end of the industrial age or the very very beginning of the modern. Which is sort of realistically accurate, since the widespread use of the abilities of these units was only common in WW2 and Korea. Yes there are still airborn units and the marines in the US army, but they perform much different roles than before and aren't strictly ment for storming Normandy any more.
4) You have to be playing on plenty of water to make marines useful and civs have to be divided by water. Its more efficient to attack from land than from sea, so pangeas obsolete marines before they are even available.
5) Once you take a city and build an airport, you have instant land access to all the civs on that continent, so marines are good for a one shot invasion.
Frankly, marines weren't useful in in Civ1 or 2 either. I used tanks, MI and artillery then, and I still do now (though I'm more likely to use CM than any artillery now).
I loved helicopters and paratroopers in Civ2. They were great point defense units. Got a unit too close to you but not in your borders. Hit it with a helicopter. Killed all the units in a city, drop a paratrooper in to save your tanks. Maybe they were too powerful

Paratroopers and marines require specific situations but there are so many ways to avoid those situations that they aren't useful.
1) You have to have no railroads between you and your target to use paras or airdrop infantry. Otherwise use tanks and MA. Helicopters would be extremely useful for setting up defenses in undeveloped areas, but there are few undeveloped areas by the time you get advanced flight.
2) You have to have to have a coastal city or unit you want to attack to use marines, otherwise just drop your units next to their city and wait a turn and listen to the AI gripe about them being there but not be able to do much about it. Also that coast city should not have MIs, or its basically suicide.
3) Neither paras nor marines are of much use fighting against MI, so they are only useful at the very very end of the industrial age or the very very beginning of the modern. Which is sort of realistically accurate, since the widespread use of the abilities of these units was only common in WW2 and Korea. Yes there are still airborn units and the marines in the US army, but they perform much different roles than before and aren't strictly ment for storming Normandy any more.
4) You have to be playing on plenty of water to make marines useful and civs have to be divided by water. Its more efficient to attack from land than from sea, so pangeas obsolete marines before they are even available.
5) Once you take a city and build an airport, you have instant land access to all the civs on that continent, so marines are good for a one shot invasion.
Frankly, marines weren't useful in in Civ1 or 2 either. I used tanks, MI and artillery then, and I still do now (though I'm more likely to use CM than any artillery now).
I loved helicopters and paratroopers in Civ2. They were great point defense units. Got a unit too close to you but not in your borders. Hit it with a helicopter. Killed all the units in a city, drop a paratrooper in to save your tanks. Maybe they were too powerful
