diff --git a/CHANGELOG-Agoric.md b/CHANGELOG-Agoric.md
index 5b6a7ac1537f..2335f6821f55 100644
--- a/CHANGELOG-Agoric.md
+++ b/CHANGELOG-Agoric.md
@@ -35,6 +35,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 # Changelog (Agoric fork)
 
+## `v0.46.16-alpha.agoric.2` - 2024-02-08
+
+* Agoric/agoric-sdk#8871 Have `tx gov submit-proposal` accept either new or legacy syntax
+
 ## `v0.46.16-alpha.agoric.1` - 2024-02-05
 
 * Agoric/agoric-sdk#8224 Merge [cosmos/cosmos-sdk v0.46.16](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.46.16)
diff --git a/x/gov/client/cli/tx.go b/x/gov/client/cli/tx.go
index f18c14874984..eb8edd5dc05f 100644
--- a/x/gov/client/cli/tx.go
+++ b/x/gov/client/cli/tx.go
@@ -59,32 +59,34 @@ func NewTxCmd(legacyPropCmds []*cobra.Command) *cobra.Command {
 		RunE:                       client.ValidateCmd,
 	}
 
-	cmdSubmitLegacyProp := NewCmdSubmitLegacyProposal()
+	cmdSubmitProp := NewCmdSubmitProposal()
 	for _, propCmd := range legacyPropCmds {
 		flags.AddTxFlagsToCmd(propCmd)
-		cmdSubmitLegacyProp.AddCommand(propCmd)
+		cmdSubmitProp.AddCommand(propCmd)
 	}
 
 	govTxCmd.AddCommand(
 		NewCmdDeposit(),
 		NewCmdVote(),
 		NewCmdWeightedVote(),
-		NewCmdSubmitProposal(),
+		cmdSubmitProp,
 		NewCmdDraftProposal(),
-
-		// Deprecated
-		cmdSubmitLegacyProp,
 	)
 
 	return govTxCmd
 }
 
 // NewCmdSubmitProposal implements submitting a proposal transaction command.
+// NOTE: This command has been modified from its original to subsume both
+// the "legacy" and the new (as of v0.46) invocation patterns. This modification
+// will be dropped once all legacy call sites have been updated to either
+// use the new pattern or call the legacy command explicitly.
 func NewCmdSubmitProposal() *cobra.Command {
 	cmd := &cobra.Command{
-		Use:   "submit-proposal [path/to/proposal.json]",
-		Short: "Submit a proposal along with some messages, metadata and deposit",
-		Args:  cobra.ExactArgs(1),
+		Use:     "submit-proposal [path/to/proposal.json]",
+		Short:   "Submit a proposal along with some messages, metadata and deposit",
+		Aliases: []string{"submit-legacy-proposal"},
+		Args:    cobra.MaximumNArgs(1),
 		Long: strings.TrimSpace(
 			fmt.Sprintf(`Submit a proposal along with some messages, metadata and deposit.
 They should be defined in a JSON file.
@@ -107,43 +109,9 @@ Where proposal.json contains:
   "metadata: "4pIMOgIGx1vZGU=", // base64-encoded metadata
   "deposit": "10stake"
 }
-`,
-				version.AppName,
-			),
-		),
-		RunE: func(cmd *cobra.Command, args []string) error {
-			clientCtx, err := client.GetClientTxContext(cmd)
-			if err != nil {
-				return err
-			}
-
-			msgs, metadata, deposit, err := parseSubmitProposal(clientCtx.Codec, args[0])
-			if err != nil {
-				return err
-			}
-
-			msg, err := v1.NewMsgSubmitProposal(msgs, deposit, clientCtx.GetFromAddress().String(), metadata)
-			if err != nil {
-				return fmt.Errorf("invalid message: %w", err)
-			}
-
-			return tx.GenerateOrBroadcastTxCLI(clientCtx, cmd.Flags(), msg)
-		},
-	}
-
-	flags.AddTxFlagsToCmd(cmd)
-
-	return cmd
-}
 
-// NewCmdSubmitLegacyProposal implements submitting a proposal transaction command.
-// Deprecated: please use NewCmdSubmitProposal instead.
-func NewCmdSubmitLegacyProposal() *cobra.Command {
-	cmd := &cobra.Command{
-		Use:   "submit-legacy-proposal",
-		Short: "Submit a legacy proposal along with an initial deposit",
-		Long: strings.TrimSpace(
-			fmt.Sprintf(`Submit a legacy proposal along with an initial deposit.
+Legacy Syntax:
+Submit a legacy proposal along with an initial deposit.
 Proposal title, description, type and deposit can be given directly or through a proposal JSON file.
 
 Example:
@@ -162,7 +130,7 @@ Which is equivalent to:
 
 $ %s tx gov submit-legacy-proposal --title="Test Proposal" --description="My awesome proposal" --type="Text" --deposit="10test" --from mykey
 `,
-				version.AppName, version.AppName,
+				version.AppName, version.AppName, version.AppName,
 			),
 		),
 		RunE: func(cmd *cobra.Command, args []string) error {
@@ -171,22 +139,39 @@ $ %s tx gov submit-legacy-proposal --title="Test Proposal" --description="My awe
 				return err
 			}
 
+			// try to interpret as a legacy submit-proposal call
 			proposal, err := parseSubmitLegacyProposalFlags(cmd.Flags())
-			if err != nil {
-				return fmt.Errorf("failed to parse proposal: %w", err)
+			if err == nil {
+				amount, err := sdk.ParseCoinsNormalized(proposal.Deposit)
+				if err != nil {
+					return err
+				}
+
+				content, ok := v1beta1.ContentFromProposalType(proposal.Title, proposal.Description, proposal.Type)
+				if !ok {
+					return fmt.Errorf("failed to create proposal content: unknown proposal type %s", proposal.Type)
+				}
+
+				msg, err := v1beta1.NewMsgSubmitProposal(content, amount, clientCtx.GetFromAddress())
+				if err != nil {
+					return fmt.Errorf("invalid message: %w", err)
+				}
+
+				return tx.GenerateOrBroadcastTxCLI(clientCtx, cmd.Flags(), msg)
 			}
 
-			amount, err := sdk.ParseCoinsNormalized(proposal.Deposit)
+			// otherwise try to interpret as a new (0.46) submit-proposal
+			err = cobra.ExactArgs(1)(cmd, args)
 			if err != nil {
 				return err
 			}
 
-			content, ok := v1beta1.ContentFromProposalType(proposal.Title, proposal.Description, proposal.Type)
-			if !ok {
-				return fmt.Errorf("failed to create proposal content: unknown proposal type %s", proposal.Type)
+			msgs, metadata, deposit, err := parseSubmitProposal(clientCtx.Codec, args[0])
+			if err != nil {
+				return err
 			}
 
-			msg, err := v1beta1.NewMsgSubmitProposal(content, amount, clientCtx.GetFromAddress())
+			msg, err := v1.NewMsgSubmitProposal(msgs, deposit, clientCtx.GetFromAddress().String(), metadata)
 			if err != nil {
 				return fmt.Errorf("invalid message: %w", err)
 			}
@@ -205,6 +190,13 @@ $ %s tx gov submit-legacy-proposal --title="Test Proposal" --description="My awe
 	return cmd
 }
 
+// NewCmdSubmitLegacyProposal implements submitting a proposal transaction command.
+// Deprecated: please use NewCmdSubmitProposal instead.
+// Preserved for tests.
+func NewCmdSubmitLegacyProposal() *cobra.Command {
+	return NewCmdSubmitProposal()
+}
+
 // NewCmdDeposit implements depositing tokens for an active proposal.
 func NewCmdDeposit() *cobra.Command {
 	cmd := &cobra.Command{