Copper axes, chisels, awls, and knife blades have been discovered in several settlements by archaeologists. Copper has been suggested for sickles, blades, chains, clamps, hammers, and axe heads in other places. Saws, goads, awls, axes, and daggers were all made of tin.
The event you're describing is called the Ra pe of Nanking. It happened in 1937. Around 50,000 innocent Chinese people were killed by Japanese troops.
Answer: Austria blamed Serbia, which then looked to Russia for support. Germany declared war on Russia in support of Austria and on France because of her alliance with Russia.
Explanation: Why did austria refuse military support to russia