Final answer:
The Battle of Saratoga in 1777 played a critical role in winning the Revolutionary War by securing French support, while the Declaration of Independence in 1776 was a significant political milestone. Other events mentioned, such as the Treaty of Paris in 1783, occurred outside the specified timeline.
Step-by-step explanation:
The events of 1774-1778 that helped win the Revolutionary War included several key milestones. Notably, the Battle of Saratoga in 1777 was a major turning point. This American victory was pivotal in securing French support for the revolutionaries, as France recognized American independence and formed a military alliance, providing essential military support. This alliance with France was crucial because it supplied the United States with not only gunpowder and funding but also with soldiers and naval forces. The French involvement was a decisive factor in the eventual defeat of Great Britain.
While the Treaty of Paris in 1783 ultimately marked the end of the Revolutionary War, confirming American independence, it was not an event that took place between 1774 and 1778 and thus does not directly answer the question. The Declaration of Independence in 1776 was also a critical event because it defined the colonies' intention to separate from Britain and become an independent nation. It was not a battle but a political action that furthered the American cause.