ἔτυχες εἰς τὴν μάχην ὑπὸ τοῦ στρατηγοῦ πεμφθεὶς → you happened to be sent into the battle by the general
P. and V. οἴεσθαι; see suppose.
I ween: use particle, P. and V. που (enclitic), δήπου, Ar. and P. δήπουθεν.