This is a common trope in Scifi; Android armies. From Star Wars, to Battlestar Galactica, these mechanical beings have influenced the content of our movies and books in many ways.
Android specs
roughly 10 times stronger than the average human
possibility to reach maximum speeds of 64 kmph
A breakthrough (possibly some form of programmable matter) has allowed us to quickly and efficiently mass produce them.
My androids use advanced AI. They are capable of handling all basic battlefield tasks without human supervision, and the high command is comprised of cyborgs with increased mental capacities. Only human interference required is to give general orders (e.g. 5th Battalion should proceed to point xy of battlefield and hold position).
Other details
This is sometime in 23rd century. While we have colonies on Mars and bases on various bodies in our solar system, they are mainly self reliant and do not fall under the jurisdiction of Earth governments. The United Nations became inefficient in in late 21st century and ceased to exist during the mid 22nd century.
The richer nations, such as the (fictional) Black Sea Union, European Union, United States of North America, the New Japanese Empire, Russia, and the New Islamic Caliphate rely heavily on Androids. The Chinese use Cyborgs (humans with cybernetic implants) to take full advantage of their relatively massive populations. The poor third world (see present day third world) have primarily human militias augmented by cyborg mercenaries.
Conflicts regularly occur in border regions, although full scale war has only happened twice so far, about once per century.
My question is this;
How would the use of cyborg and android soldiers by major world powers affect weapons design.
The use of these robotic contraptions would surely affect how weapons are designed. Weapons would be targeting the internal circuitry rather than the exterior shell since damage of the metal armor would do nothing but "piss them off."
If you need clarification of any kind, leave a comment.