Congo River and "Congo" is the preferred English name in 19th-century literature, although references to "Zahir" or "Zaire" as the name used by the inhabitants remained common. The Democratic Republic of the Congo and the Republic of the Congo are named after it, as was the previous Republic of the Congo which had gained independence in 1960 from the Belgian Congo. The Republic of Zaire during 1971–1997 was also named after the river, after its name in French and Portuguese. The Congo's drainage basin covers , an area larger than India. The Congo's discharge at its mouth ranges from , with an
27th Armoured Brigade reserve, 9th Brigade Group. During the follow-up operations after D-Day the 27th Armoured Brigade continued to support I Corps' attacks along the River Orne towards Caen. On 11 June a squadron of 13/18th Hussars supported 6th Airborne Division's attacks along the river, and later in the month the regiment supported 51st (Highland) Infantry Division in further attacks along the river. On 8 and 9 July, 27th Armoured Brigade supported I Corps' final successful attack on Caen. On 18 July Second British Army began a major offensive south from Caen (Operation Goodwood). I Corps' task was to attack along the left