Remember the UK wanted to send refugees from the UK to Rwanda and then "pay" Rwanda for this? Well those same "refugees" are possible fighters, trainers + with UK funding, Rwanda can then get local militia to work on their behalf whilst creating the export channels through Rwanda, increasing their tax base.

This is basically what is happening but our president too much of a poes to call them out - he calls them out then back tracks because "we are family" or some bullshit or another African unity vibe