From the BBC:
Uganda will withdraw its forces from UN-backed international missions, Security Minister Muruli Mukasa says, escalating a long-running row....The UN infuriated Kampala when it published an experts' report accusing Uganda of arming Congolese rebels....The remarks from the security minister echo a statement made in the Ugandan parliament on Thursday by Prime Minister Amama Mbabazi.
Link:http://www.bbc.co.uk/news/world-africa-20187369

Other operations in the Central African Republic - the hunt for Kony & the LRA and the Democratic Republic of Congo will be affected.

Note Uganda was recently elected to the UNSC, with an overwhelming vote, so may have some clout in NYC.

One wonders how the EU & USA, the biggest known supporters of AMISOM, will react. What is more important the hell-hole of Somalia or eastern DRC? Time for some delicate diplomacy and more US$ to Uganda.