I've sent a simple transaction (no smart contract invocation) while my geth node had no peers attached. It created the transaction fine and returned a transaction identifier.
Even with many nodes connected now, I cannot find this transaction on any block explorer. I presume this means it wasn't broadcasted?
How can I rebroadcast the transaction?

var tx = eth.pendingTransactions[0], without parentheses. – carver May 03 '17 at 02:33eth.resend(eth.pendingTransactions[0]) Error: Transaction 0885f7449756ae676259370a7c20dcf1c983f4276b7b333de505460928c1b164 not found– cobordism Jun 21 '17 at 11:42