1649 - English Civil War: The Rump Parliament votes to put Charles I on trial (Source)
I think it was Oliver Cromwell who said:
"You need not hope in order to undertake, and you need not succeed in order to persevere." The following sermons and podcasts are on Oliver Cromwell and the English Civil War:
Oliver Cromwell: Saint, Soldier, Statesmen, by Dr. Alan Cairns (Text: Hebrews 8)
Oliver Cromwell, by Dr. Peter Hammond
Oliver Cromwell and His Russet-Coated Heroes, by Bill Potter
The Life and Labors of Oliver Cromwell, by Rev. Colin Mercer
Oliver Cromwell Lord Protector of England, by Rev. Ian Goligher (Text: 1 Samuel 18:12)
1762 - Great Britain declares war on Spain, which meant the entry of Spain into the Seven Years' War (Source)
Recommended sermons and podcasts:
The Colonial Wars of America and Providential Significance, by Historian Bill Potter