The 90th Regiment of Foot (Perthshire Volunteers) was a Scottish infantry

Infantry

Infantrymen are soldiers who are specifically trained for the role of fighting on foot to engage the enemy face to face and have historically borne the brunt of the casualties of combat in wars. As the oldest branch of combat arms, they are the backbone of armies...

 regiment

Regiment

A regiment is a major tactical military unit, composed of variable numbers of batteries, squadrons or battalions, commanded by a colonel or lieutenant colonel...

 of the British Army

British Army

The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

, active from 1794 to 1881.

The 90th was raised in 1794 for service during the French Revolutionary Wars

French Revolutionary Wars

The French Revolutionary Wars were a series of major conflicts, from 1792 until 1802, fought between the French Revolutionary government and several European states...

, and later the Napoleonic Wars

Napoleonic Wars

The Napoleonic Wars were a series of wars declared against Napoleon's French Empire by opposing coalitions that ran from 1803 to 1815. As a continuation of the wars sparked by the French Revolution of 1789, they revolutionised European armies and played out on an unprecedented scale, mainly due to...

. In the post-war period the regiment saw action in
South Africa

Cape Colony

The Cape Colony, part of modern South Africa, was established by the Dutch East India Company in 1652, with the founding of Cape Town. It was subsequently occupied by the British in 1795 when the Netherlands were occupied by revolutionary France, so that the French revolutionaries could not take...

, serving in the 7th and the 9th Xhosa Wars

Xhosa wars

The Xhosa Wars, also known as the Cape Frontier Wars, were a series of nine wars between the Xhosa people and European settlers, from 1779 to 1879 in what is now the Eastern Cape in South Africa....

. For this service they won two battle honours, "South Africa 1846-7", and "South Africa 1877-8-9".

In 1881, as part of the Childers Reforms

Childers Reforms

The Childers Reforms restructured the infantry regiments of the British army. The reforms were undertaken by Secretary of State for War Hugh Childers in 1881, and were a continuation of the earlier Cardwell reforms....

, the 90th Regiment was amalgamated with the 26th Regiment and became the 2nd Battalion Cameronians (Scottish Rifles).