It should be 1, WWI hope this helped.
1. Concerted - a unified action by a group of people to achieve a goal
2. Contentious - to be argumentative or in extreme disagreement
3. Natal - having given birth
4. Ruckus - overtly loud, obnoxious, or noisy
5. Staple - a unified action by a group of people to achieve a goal
52341
not much but it's honest work
Entertainment? if not can i see the answer choices
<span>His efforts to conquer land in all directions brought several nations together in an alliance to defeat him.</span>
