What groups might dispute european land claims in the west

Why did european nations face financial challenges after world war 1?

Which best describes the impact of the crusades on european exploration?

Can someone answer these question about vasco de gama for me: when? (when did he started his travel)from where & to where? (from where he was and then where he went to)motives? (what was his motives for traveling)accomplishments & discoveries? i will give you 15 star for answering all of these, you so much.