So mate
The first point in I26 is only available up until the end of game turn five. So that means that you have to push the Americans out of that building by that point in time and control it.
Skilful American play will mean that this does not necessarily occur 100% of the time
the Americans on the other hand should be doing everything they can not to lose it with units in the building and units flanking either side of it. Especially if he's worked at locating rubble that restricts lines of sight to that building.
You then receive at the end of the game (a turn and 1/2 later) 1.4 the following
H 27, I 26, I 28, K 26, K 29, L 26 and L 28.
Again assuming you have all those ?
Of course they get an extra one if they have more MOBILE AF fees the new Americans, those two immobilised tank destroyers and a couple of bazookas can level the playing field in that area quite easily.
I played this several times in play tests and more recently and an American player can stop the I26 from falling by the end of the game let alone the end of turn five
Hope this helps grateful scenario really enjoyed it