Several reasons.
Saw this crusade as a blessing from God.
Christians would stop fighting themselves.
Christians that would fight would go to heaven or be right with God.
To take back the holy lands, from the Muslims would be a righteous cause.
These were the essentials in the first century church: the communion supper was observed (Acts 20:7; 1 Corinthians 11:25–26), prayers were offered up (1 Corinthians 14:15–16), songs were sung to the glory of God (Ephesians 5:19), a collection or offering was taken (1 Corinthians 16:2), and the Scriptures were read, preached and taught (Acts 20:7; Colossians 4:16; 2 Timothy 4:2).
I do not think he listed all in one passage, but he did let the churches know throughout his letters what they needed to do to hold a worship service. (the biblical passages you see, Acts was not written by Paul but it narrates his part of his life and ministry from chapters 9 thru 28).
They are important because besides praising God passionately, their faith was shared with others and more people were been converted to Christianity, so they needed to be nurtured spiritually to grow in their faith and know God better with the help of the church leaders through the Scripture.
Hope it helps! If you have another question, comment this answer. I’d be more than glad to help.
The naval battle of Trafalgar was fought on October 21, 1805. The British fleet under Lord Nelson met a combined fleet of French and Spanish ships off the coast of Spain. The English fleet won a tremendous victory ensuring that Napolean would not be able to invade Britain. Admiral Lord Nelson died during the battle.
The scientific revolution occurred in the mid-1500s and represented a new way of thinking. During the Renaissance, there was an increased exploration of the world outside Europe, leading to the discovery of Africa, Asia and the Americas. These explorations expanded the European's understanding of religion and culture. Alongside the exploration, the creation of the printing press, the development of astronomy and mathematics were of great impact for the society.
Mankind's need to look closely into these new regions, to develop new tools, instruments and techniques to better explore and understand the world around them lead to the development, spread and great impact of the scientific revolution.
Roosevelt essentially took the opposite approach as Hoover in taking on the Great Depression. Herbert Hoover thought that America and its economy could naturally recover from the Depression in due course, so he adamantly restrained the federal government from intervening on behalf of the people affected. On the other hand, Roosevelt dramatically increased employment by expanding the federal government and establishing agencies that would aid in relieving some of the country's worst problems.
