to invite / to recruit / to levy (taxes) / to draft (troops) / phenomenon / symptom / characteristic sign (used as proof) / evidence
征
=
彳
+
正
:
James II of England (zh) recruited (征) the stick figure (正) to join him on an expedition (征). Legend has it that an ancient civilization left their black sneakers (彳) in front of the engine ((e)ng1). After they dug up most of the ground they finally find the sneakers.
to call together / to summon / to convene / temple or monastery (used in place names in Inner Mongolia)
召
=
刀
+
口
:
Mnemonic symbol: an intercom to call everyone together. James II of England (zh) prepares a few mandarins (口) for everyone in the aorta's bathroom (ao4) by cutting them with a cleaver (刀). As he is finished he calls all the blood platelets together (召) over the intercom (召) to come over and fetch a piece.