A simple guide for new members

now its not very rare, so thnx for putting this out there

Unfortunetly no they don't have that in the help tab. And here's some more useful info too.
Advanced strategy
To determine shooting distance, take the distance of the field then subtract 300, lvl ten tech shooting with catapults will give you a 1260 field length, -300 means the cats can shoot 960, the lvl 10 turrets can shoot 1050. 

Strategy guide 2
           catapults 
Field length   Level  shooting  
1100                 0         800 
1116                 1.        816
1132                 2.        832
1148                 3.        848
1164                 4.        864
1180                 5.        880
1196                 6.        896
1212                 7.        921
1228                 8.        928
1244                 9.        944
1260                 10.      960
            Turrets
Field length   Level shooting 
900                   1       600
950                   2       650
1000                 3       700
1050                 4       750
1100                 5       800
1150                 6       850
1200                 7       900
1250                 8       950
1300                 9       1000
1350                 10     1050
====
This is useful when determining if you will be able to take out enemy turrets or catapults when you are attacking or being attacked, if your shooting tech is lvl 5 your field length will be 1180 when you're attacking with catapults, if the field length that you are attacking is higher than 1180(your number) then you know the enemy will hit you at a farther distance then you can attack from. You can tell the enemy turrets or catapult attack distance by the field length but only if it's greater than your field length. 

I dont get it.

hes showing you how the field length
(battlefield) is always 300 units longer than the soldier or trap or turret with the highest range.

Unfortunetly no they don't have that in the help tab. And here's some more useful info too.
Advanced strategy
To determine shooting distance, take the distance of the field then subtract 300, lvl ten tech shooting with catapults will give you a 1260 field length, -300 means the cats can shoot 960, the lvl 10 turrets can shoot 1050. 

Strategy guide 2
           catapults 
Field length   Level  shooting  
1100                 0         800 
1116                 1.        816
1132                 2.        832
1148                 3.        848
1164                 4.        864
1180                 5.        880
1196                 6.        896
1212                 7.        921
1228                 8.        928
1244                 9.        944
1260                 10.      960
            Turrets
Field length   Level shooting 
900                   1       600
950                   2       650
1000                 3       700
1050                 4       750
1100                 5       800
1150                 6       850
1200                 7       900
1250                 8       950
1300                 9       1000
1350                 10     1050
====

Wouldnt level 10 turrets have the range of 1250? That would make sense because cats are able to take lvl 10 turrets out when they move 99 movement(without losses) and not when they move 100.

Please correct me if I am wrong.

no lvl 10 turrets make the field length 1350, the cats move forward 99 hexes which is still just out of the reach of the turrets, then they move forward 99 more which puts them close enough to wipe the first row of turrets but not far enough forward to get hit by the second row of turrets. because cats have a higher base speed than turrets the cats shoot first hencefore wiping cats with no losses

Perhaps I worded it incorrectly, but what I meant to say was that Lvl 10 turrets have the ability to shoot 1250 but it carries a 1350 field length.

no turrets shut 1050, the field length is the range of the longest unit +300

because there are three rows of turrets at field lengths 0,100,200 your front row can shoot 1050 forward on top of being 200 infront of the defenders back row