Despite their technological advantages, the Stahlhelm Army's advance was halted at New Saigon through Vietnam's guerilla-style tactics. Fighting is now happening street by street, and neither sides can gain ground without losing it, and vice versa. A deadlock at the First Battle of New Saigon is now setting in.
Credit to @ruantu01 for some SFX and modeling. Though the Stahlhelm Army can hold their own in thick jungles such as these, the Vietnamese Empire can easily do the same. Meanwhile, Stahlhelm's helicopters and tanks are becoming bogged down, and the infantry does most of the heavy lifting as the battle intensifies.