8 August 1919 - The Treaty of Rawalpindi.

80 years, almost to the day, after British troops entered Kabul the final definitive treaty recognizing Afghan independence was signed.

The 3rd Afghan War began in May 1919 (see 3 May). The short war ended with a British victory, but in the immediate post-war era the British were keen to get out of the conflict as soon as possible. Signed in Rawalpindi in India the Afghans were remarkably well treated - Afghan independence was fully recognized along with the existing border and Afghan foreign policy was no longer to be dictated by the British from India.   

9 August 1855 - The Bombardment of Sveaborg.

Although the 1853-56 war between Russia and an alliance of Turkey, GB and France is known as the Crimean War, because most of the fighting took place on the Crimean peninsula, there were other theatres of war including the Baltic.

A demonstration of naval power was deemed necessary in the Baltic, so a combined fleet of 77 ships from GB and France under the command of Rear-Admiral Richard Dundas dropped anchor off the Russian island fortress of Sveaborg (modern Suomenlinna, Finland) on 6 August 1855 and after landing a mortar battery on an uninhabited island opened fire three days later. The allied fleet was so positioned as to be out of reach of Russian artillery but the target within range of their own guns. 

The bombardment lasted for two days when the fleet sailed away a demonstration made.