Complex sentence: In 1550, Shingen advanced once again into Shinano, and quickly conquered Hayashi Castle, Kiribara and Fukashi Castle (see Fukashi siege) controlled by Ogasawara Nagatoki who fled to Murakami Yoshikiyo.
Split into simpler sentences: In 1550, Shingen advanced once again into Shinano, and quickly conquered Hayashi Castle, Kiribara and Fukashi Castle (see Fukashi siege). These had been controlled by Ogasawara Nagatoki, who fled to Murakami Yoshikiyo.