I downloaded the combat calculator again.
A CI bowman vs a CI chariot has 26% odds, and an 86% chance of making 2 hits (66 HP remaining), which gives our defending bowmen in Jamestown >97% chances. Even if we only hit it once the chariot then only gets 10% odds against Jamestown. The chariot will be left with:
100 HP 3.48%
83 HP 10.07%
66 HP 15.19%
49 HP 16.79%
32 HP 15.42%
15 HP 12.51%
Dead 26.55%
I don't like attacking with a second bowman - if the chariot is unscratched we may have to, but it leaves the two axes on the jungle vulnerable unless you get the bowman from Hastings to cover - at which point the chariot can hit Hastings.
Assuming we get two hits on the chariot the next bowman attacks the axe at 38%. The axe will be left with:
100 HP (2%)
81 HP (6%)
62 HP (11%)
43 HP (14%)
24 HP (14%)
4 HP (13%)
Dead (38%)
Then a bowman from Jamestown probably gets a shot at the spear - 76% battle
Then a bowman from Jamestown probably cleans up the injured chariot (44% if one hit, 72% if two, 92% if three hits on chariot already)
Then a bowman from Hastings probably cleans up the injured axe (60% if one hit, 90% if two hits on axe already)
The problem is if the chariot or axe emerge unscathed or with only one hit from the initial battles... So lets throw one bowman from the jungle at them and see what happens.
Edit: Except the chariot and axe don't have CI, so our odds are slightly better
A CI bowman vs a CI chariot has 26% odds, and an 86% chance of making 2 hits (66 HP remaining), which gives our defending bowmen in Jamestown >97% chances. Even if we only hit it once the chariot then only gets 10% odds against Jamestown. The chariot will be left with:
100 HP 3.48%
83 HP 10.07%
66 HP 15.19%
49 HP 16.79%
32 HP 15.42%
15 HP 12.51%
Dead 26.55%
I don't like attacking with a second bowman - if the chariot is unscratched we may have to, but it leaves the two axes on the jungle vulnerable unless you get the bowman from Hastings to cover - at which point the chariot can hit Hastings.

Assuming we get two hits on the chariot the next bowman attacks the axe at 38%. The axe will be left with:
100 HP (2%)
81 HP (6%)
62 HP (11%)
43 HP (14%)
24 HP (14%)
4 HP (13%)
Dead (38%)
Then a bowman from Jamestown probably gets a shot at the spear - 76% battle
Then a bowman from Jamestown probably cleans up the injured chariot (44% if one hit, 72% if two, 92% if three hits on chariot already)
Then a bowman from Hastings probably cleans up the injured axe (60% if one hit, 90% if two hits on axe already)
The problem is if the chariot or axe emerge unscathed or with only one hit from the initial battles... So lets throw one bowman from the jungle at them and see what happens.
Edit: Except the chariot and axe don't have CI, so our odds are slightly better

Completed: RB Demogame - Gillette, PBEM46, Pitboss 13, Pitboss 18, Pitboss 30, Pitboss 31, Pitboss 38, Pitboss 42, Pitboss 46, Pitboss 52 (Pindicator's game), Pitboss 57
In progress: Rimworld
In progress: Rimworld