Welcome to the forum. If you are playing the historic scenarios via HITS, some of them are very difficult to win with a major victory. The points required were taken from games played at the normal difficulty setting which is far easier than what you are doing. If you want to play the scenarios and not worry about point totals, download the SDK and play the scenarios as a mod. To do that just create a sub folder in your \Mods folder with a name such as \HistoricScenarios. Now place the \Scenarios folder from the SDK into the folder you just created.
Now go to the Modifications screen of the game and click twice on the name of the mod you just made. A yellow square will appear to the left of the name. Click the check mark at the bottom. Then go to the Single Player screen and select User Scenarios. There you will see all the historic scenarios. You can select any one you wish in any order you choose. Good luck.
I can make this march and I will make Georgia howl.