The word "ally" in this context means:
a country that helps another country during a war.
1. In the text, it mentions France being a crucial ally of America during the Revolutionary War. This means that France supported and assisted America in their fight against the British army.
2. An ally is a nation that forms a partnership with another country to achieve common goals, especially in times of conflict or war. Allies work together to provide support, resources, and military assistance to each other.
3. Therefore, in this case, France was considered an ally of America because it supported and fought alongside the American forces against the British, playing a significant role in the outcome of the Revolutionary War.
In summary, an ally is a country that provides help and support to another country, especially during times of war or conflict. France's support to America during the Revolutionary War exemplifies the role of an ally in military alliances.