If you're referring to the Revolutionary War, Native Americans chose to either fight on the side of the British, or on the side of the colonists. At the same time, Native Americans were facing challenges defending their own homeland against the imperial powers.
The Canterbury Tales was important as it was one of the first major works in literature written in English. In the centuries following the Norman invasion, French was the language spoken by those in power. However, Chaucer chose to write in English
The adjective in this sentence would be modifying the noun "arch" since the adjective (tall) is making the reader better understand certain characteristics of the arch.
