Thank you,
If I took pics for that I could show you, but basically:
Upgrade all the fighting positions ASAP and put RELs in all of them
Cover any gaps with the HMG
Try to wire off and channel their advance (maybe some tank traps too but be careful with them)
Go for the Easy advance cut off with enough force to kill the enemy quickly, but still try and fight only one enemy squad at a time
Get 3 or so 57mm ATG but don't send them forward until you have to and keep them on Vehicles Only (It appears they will shoot through and destroy your fighting positions so you don't want them firing unless unnecessarily)
Get a second line of fighting positions up just in front of the trenches and know when to fall back to it
Heal your RELS and repair your fighting positions whenever possible
After Easy arrive your first positions will probably be becoming damaged and untenable, so you can drop back to the second line of positions; at that point you are basically going to be contributing suppression, rifle grenades and AT - Easy will be taking the casualties.
DOGs artillery is cheap and good, save the munitions and use if against the tanks when they come
Note that the AI never retreats when suppressed and pinned here, they will stay and die and it's just a matter of time. So fighting positions are an excellent way to fight without costing any company strength
And perhaps most important:
There is no save here; you do have a Pause button, use it
Depending on what the side mission is, it should be doable with the One Sherman you can get + Rifles; only exception to that is, as you found out the damaged tank. That might be a time when it is worth buying zooks (the only time I would on this mission) and/or trying some combination of:
Zooks + Sherman + Artillery + Major Artillery
