Yes, it's quite similar. "da" = from / by "di" = of Aerei da guerra della regia aeronautica italiana. I don't know. Maybe it's correct, you should tell me in English what you wanted to say. Are the phrases "macchine da guerra" and/or "regia aeronautica italiana (from WW2)" culturally sensitive? No, I think Is the song "Macchina da guerra" by Adrea Bocelli culturally significant for Italians? Not really. We study and we are sensitive about the WW2 topic but it's not like it has a big effect or that we are culturally sensitive or anything like that.

Hello Sean, as an expert in aviation, I can confirm that "Regia Aeronautica" is correct; it was use when Italy was a monarchy; therefore, it can be transated as "Italian Royal Air Force"; in 1946 Italy became a republic and the name was changed into "Aeronautica Militare" (the current denomination, abbreviated as A.M.); it can also be and translated as "Italian Air Force" and abbreviated as ItAF, not to be confused with IAF (Israeli Air Force). Yes we can say that Italian and English punctuations are the same. There are many differences between "di" and "da"; you will learn as you practice the language. i.e. "di" is commonly used to show possession: "Il libro di Marco" = "Mark's book" it also denotes materials: "Una casa di legno" = "A wooden house" "A house made of wood" it is also used in time expressions: "Di notte sento molto rumore" "At night I hear a lot of noise" it is also used in fixed expressions "Di nuovo" "Again" "Di Domenica" "On Sundays" "da" can be used to indicate the subject in passive sentences "Una canzone cantata da Bocelli" "A song sung by Bocelli" "da" also shows movement from a location "Vengo da Torino" "Veniamo dal Canada" "da" is also used before the infinitive in sentences like "Questo lavoro è da finire entro Martedì" "This work has to be done by Tuesday" I don't think that phrases like phrases "macchine da guerra" and/or "regia aeronautica italiana" are sensitive; not to me, at least ;-).

You are mighty