Complex sentence: On 5 September a Japanese reconnaissance aircraft scouted the port and reported that the Asian German fleet had departed; the Japanese ordered the dreadnought, pre-dreadnought and cruiser to leave the blockade.
Split into simpler sentences: On 5 September a Japanese recon plane scouted the port and reported that the Asian German fleet had departed. As a result, the Japanese ordered the dreadnought, pre-dreadnought and cruiser to leave the blockade.