Austria-Hungary had invaded and crossed over into, Serbia and Russia was in an alliance with Serbia, so they felt as though they had to help out. Hope this helps.
One of the main reasons why New England merchants became leading members of society is because they were able to accumulate large amounts of wealth, due to the fact that trade was quite profitable during this time.
Answer:
When France's expansion into the Ohio River valley brought repeated conflict with the claims of the British colonies, a series of battles led to the official British declaration of war in 1756.
Explination:
The French and Indian War began in 1754 and ended with the Treaty of Paris in 1763. The war provided Great Britain enormous territorial gains in North America, but disputes over subsequent frontier policy and paying the war's expenses led to colonial discontent, and ultimately to the American Revolution.
Led to the creation of a two chamber congress. Also created was the House of Representative which is determined by a state's population