Passive perception determined how far into the ambush you got, if at all.
The hobgoblins you can see are wearing chainmail and holding longbows. A shield and longsword are kept in reserve.
Enemies in the treeline will receive cover (1/2 or 3/4, depending on how far you are from them). Climbing from the 'road' to the 'grass' just counts as difficult terrain, no check required.
Players win initiative ties vs. enemies.
Despite there being four enemy sets and five players, it basically turned into side initiative. Wuffles and Bernie up first (though I'm not sure Wuffles can attack without a command to do so?). The Red and Blue markers on the hobs in the trees are just to separate them by initiative, though it didn't matter in this case. I'll do similar stuff in the future though, so better to note it now :P
Initiative Order:
Wuffles: (1d20)[18]
Bernie: (1d20)[18]
HH: (1d20)[18]
LH: (1d20)[15]
BH: (1d20)[7]
RH: (1d20)[6]
Leif:(1d20)[5]
Ayalla:(1d20)[4]
Paul:(1d20+1)[4]