The 73rd Carnatic Infantry was an infantry regiment originally raised in 1776 as the 13th Carnatic Battalion (using drafts of men from the 4th, 7th and the 11th Carnatic Battalion) as part of the Presidency of Madras Army which was itself part of the Honourable East India Company Army.

The presidency armies, like the presidencies themselves, belonged to the East India Company until the Government of India Act 1858 (passed in the aftermath of the Indian Rebellion of 1857) transferred all three presidencies to the direct authority of the British Crown.

During World War I, they remained in India on training and internal security duties attached to the 9th (Secunderabad) Division.

After World War I the Indian government reformed the army moving from single battalion regiments to multi battalion regiments.

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