This is a sentence from a medieval book known as "De antiquitate regum Norwagiensium", which was written by Theodoricus Monachus.
Quinto ergo anno regni Olaui, filii Tryggua, intulerunt ei bellum Sueino, Olauus, Ericus, et eum nimis imparatum invenerunt.
Thoughts: Please note that "Sueino" is written in nominative case, despite not looking like a name in the nominative case. I am fairly certain that "Sueino", "Olauus", and "Ericus" are the subjects for the verb "intulerunt". I also think that the verb "invenerunt" refers back to these three subjects. What I am curious about, however, is whether these nouns are implicit subjects for the verb "invenerunt" or not.