Elementary Estonian to help reading the maps.
In the maps the colours indicate nationality:
Blue = Estonians
Green = Latvians
Yellow = Freikorps
Regiments – polk for Estonians, rüg. for Freikorps – are noted with Arabic numerals.
Battalions – pat – with Roman numerals
Companies – rood – with Arabic numerals
Alates = always (hence "all day" in this sense)
Asetus = positions
Balti Landesveer = Baltic Landeswehr
Enne pealetungi = before the attack
ja = and
Pärast pealetungi = after the attack
Pataljon = Battalion
Polk = regiment (Estonian)
Rood = company
Ruaddiviis = Iron Division
Rügement = regiment (German)
Soomusauto, S-auto = armoured car
Soomusrong, S-rong = armoured train
Lemsalu = Limbazi
Riia = Riga
Roopa = Straupe
Volmari = Valmeira
Võnnu = Cesis (and hence the 2. Võnnu polk is the 2nd Cesis Regiment)