Tones of Mandarin words in military drills
The essential part for military drills is to sound loud and vibrant. It is hard to sound loudly when the drill is given in tones rising and falling, so all the characters in drills are pronounced in a level tone, only with the pitch varying. So those of higher pitch will seem like the #1 tone, and those lower pitch will seem like the #3 tone as compared.

向右转 443 -> 331 “想有——专——” or 131 “香有——专——”

齐步走 243 -> 331 “起补——邹——” or 131 “七补——邹——”