The answer is Trench Warfare the gas masks were not that effective back then and gas raises so if you were in a trench for the most part you would be fine but they did both.
Answer:
This website is very useful. Hope it helps.
https://prezi.com/mb_gkr8goebv/chapter-32-dq/
Explanation:
The main purpose of the House of Wisdom, built by the Abbasid dynasty in Baghdad was to translate the ancient Greek words of literature into the Arabic language.
The House of Wisdom was mainly a library, an academy of scholars from across the whole empire as well as a translating institute.
<span>It allowed the US government to work with other countries to reduce tariffs.</span>