Yugoslavia had 60 of these aircraft in operational service before Italy begged Hitler to attack them so they could get to Greece to help out the failed Italian invasion.

Do-17k in the Kingdom of Yugoslavia

In februari 1940 the Belgian army ordered 88 Tricars(three-wheeled) from the FN factory,for delivery in july 1940.These were to mount  a heavy FN-Hotchkiss 13,2 mm AA machinegun.Unfortunately for the Belgian Army  ,the Germans attacked on the 10th of may 1940 so their highly usable fighting vehicles would not be delivered on time!greetz,brummbar

Belgian FN Tricar

When Croatia became an independent state it quickly assembled an Army and Air force.