Which northern battle in july of 1863 lasted three days and had 51000 casualties

What role did the alliance system play in preventing austria-hungary and serbia from coming to a compromise settlement?

Pls. i will give you 40 points colonists felt the increased taxes in the 1760s and 1770s violated which document? the virginia declaration of rights the mayflower compact the english bill of rights common sense

What are some inventions during the han dynasty?