<span>The birthday of my son is that what you said my translation is alittle rough</span>
Answer:
huh? i'm sorry but language and what are you asking
Explanation:
I believe the correct answer is exercitui.
You need the perfect passive form here, which is formed when you combine the verb esse in the present tense (here, sunt because of third person plural), and the appropriate participle in the same person, which in this case is exercitui - third person plural.