Wings (1927)

In the first Academy Award Best Picture winner by director William Wellman:

• the spectacular aerial photography and dogfight scenes (shot in the air and not in a studio) - including a sequence in which a German pilot was hit (blood spurted from his mouth) and his plane went into a fiery tailspin
• the final battle sequence (a full-scale reconstruction of the Battle of St. Mihiel)
• the first on-screen male-male kiss on the lips when a handsome young soldier John "Jack" Powell (Charles "Buddy" Rogers) placed a lingering kiss on the mouth of his dying friend David Armstrong (Richard Arlen) in the aftermath of the battle