On this day, 171 years ago, September 20, 1854 (July 28, the 1854 lunar calendar), the Battle of the Arma River began. On September 20, 1854, the Battle of the Arma River began. After landing on the Crimean Peninsula on the 14th, the 62,000 expeditionary force composed of Britain, France and Turkey began to advance south and reached the Arma River on the 19th. Russian commander Menshkov commanded 38,000 Russian troops and 120 artillery pieces to retreat to the south bank of the river to hold firm. On the 20th, General Raglen commanded the British army on the left wing, and the French army commanded by Marshal Saint-Arnault on the right wing, launching simultaneous attacks on the Russian positions. The Russian army suffered heavy losses under the fierce attack of the Anglo-French coalition forces and was forced to retreat to Sevastopol. The Russian army lost 5700 people in the battle, and the Anglo-French coalition forces lost less than 3000 people. Comment: The Battle of the Arma River gave the Anglo-French Expeditionary Force a firm foothold on the Crimean Peninsula and established the situation for the Crimean War.