"Tomorrow we meet the enemy."
Translation:I morgon möter vi fienden.
Yes, that's wrong. If a sentence starts with a time expression like "I morgon", the next part has to start with the verb. This is called the "V2 Rule", meaning that the verb has to be second in a Swedish sentence. Usually, you have 1:Subject, 2:Verb. But here, you have 1:Time-expression, 2:Verb, 3:Subject.
Also see Zmrzlina's response to a similar question at the beginning of this thread.