The Military of Swaziland (Umbutfo Swaziland Defence Force) is used primarily during domestic protests, with some border and customs duties; the force has never been involved in a foreign conflict. The army has struggled with high rates of HIV infection. Since measures were put in place the rate is dropping. The USDF replaced the Royal Swaziland Defence Force, which was created in 1973 to replace the role of the British Army following independence in 1968.