Reformed as the Alexandra Cavalry Volunteers, the troop guarded Wanganui during the Titokowaru campaign (1868), and took part in the Parihaka operation (1881).

In 1868, Trooper William Lingard, a founding member of the Alexandra Troop, won the New Zealand Cross for rescuing a comrade under enemy fire at Titokowaru's pa at Tauranga Ika.

Volunteers from Alexandra Mounted Rifles served in South Africa during the Boer War, where Farrier Sergeant Major William James Hardham won the Victoria Cross at Naauwpoort, in January 1901, where he rescued a wounded comrade while under heavy enemy fire.

New Zealand's mounted regiments were particularly prominent in battles fought at Outpost No 3, Table Top, Chunuk Bair and Hill 60.

After the evacuation of Gallipoli in December 1915, the squadron spent the remainder of the war on horseback, fighting the Turkish Army in the Sinai Desert and in Palestine, as part of the ANZAC Mounted Division.

Notable battles were fought at Rumani, Rafa, Magdhaba, Gaza, Beersheba, Ayun Kara, in the Jordan Valley and at Amman.

During the Second World War (1939–1945) many volunteers from Queen Alexandra's Mounted Rifles served overseas in various units, particularly in the 2nd New Zealand Divisional Cavalry Regiment.

Men of the regiment also served in New Zealand during the war, firstly on horses and then in a wide variety of light armoured vehicles.

It included the 2nd Light Armoured Fighting Vehicle Regiment (Queen Alexandra's Wellington West Coast Mounted Rifles).

In November 1964 the Regimental Guidon was paraded for Her Majesty the Queen at Buckingham Palace, by a composite group of 140 members of the New Zealand Army.

A year later the unit regained the title of Queen Alexandra's Mounted Rifles, Royal New Zealand Armoured Corps.

In 2004, the unit downsized to a squadron, began re-equipping with the NZLAV, a version of the LAV III armoured vehicle especially developed for the New Zealand Army.

It is now taken on ceremonial parades and inspections to mark a unit's achievements, and displayed to soldiers and spectators that it may provide a memorial to the men of all ranks who served under it and to afford an inspiration for patriotic service and sacrifice to all who may behold it.

The battle honours of the unit which have been approved for emblazonment appear on either side of the central emblem in small gold scrolls, their chronology being from left to right, beginning at the top with the exception of the battle honours "New Zealand" and "South Africa 1899–1902", which appear beneath the unit motto.

The QAMR Guidon is carried by the Squadron Sergeant Major (SSM), with an escort of two Senior Non Commissioned Officers (SNCO).

The regimental badge is of a punga tree encircled by a baggage strap, bearing (above) Queen Alexandra's and (below) 2nd W.W.C (Wellington West Coast) Mtd Rifles.